Research

Current Projects

LOTUS PTO

Full title of the project:
LOTUS PTO – Laser-Structured Bio-Inspired Surfaces for Enhanced Survivability and Efficiency of Marine Power Take-Off Systems

Program:
Clean Energy Transition Partnership (CETP) 2024 – TRI2 Advanced Renewable Energy Technologies for Power Production (Ocean Energy)

Project partners:
International transnational consortium (Austria and partner countries within CETP framework)

About:
LOTUS PTO develops and validates bio-inspired, laser-structured surface technologies to enhance efficiency, durability and survivability of critical components in wave and tidal energy converters, with a specific focus on Power Take-Off (PTO) systems.

Inspired by hierarchical natural surface structures, the project designs and manufactures micro- and nano-structured textures that simultaneously reduce biofouling, improve tribological performance and minimize friction losses in harsh marine environments. By combining advanced laser structuring, high-fidelity simulations, AI-supported microscopy and experimental validation, LOTUS PTO advances the technology from TRL3 (proof of concept) to TRL5 (validation in relevant ocean environments).

Marine renewable energy systems face severe operational challenges due to biofouling, corrosion, wear and fluctuating hydrodynamic loads. LOTUS PTO addresses these limitations through optimized surface architectures that enhance reliability while reducing maintenance frequency and operational expenditure. The methodology integrates interdisciplinary expertise in fluid dynamics, surface engineering, material science and ocean testing to ensure robust upscaling toward real-world conditions.

The project contributes directly to the clean energy transition by increasing efficiency and lifetime of tidal and wave energy systems. Through improved antifouling behavior and friction reduction, LOTUS PTO supports higher device availability, lower lifecycle costs and enhanced performance of ocean renewable energy technologies.

By bridging nature-inspired design, precision laser manufacturing and data-driven optimization, LOTUS PTO establishes a scalable surface engineering platform for next-generation marine energy applications.

ACE WIND

Full title of the project:
ACE WIND – Aerodynamic and Computational Enhancement for Wind Energy Innovation and Drag Reduction

Program:
FFG Basisprogramm – Internationale Kooperation (EUREKA Globalstars Austria–Japan)

Project partners:
Bionic Surface Technologies GmbH (Austria) | LEBO Co., Ltd. (Japan) | NIKON Corporation (associated partner)

About:
ACE WIND develops a next-generation prediction and optimization tool to unlock the full aerodynamic potential of bio-inspired riblet surfaces on wind turbine blades under real dynamic operating conditions. While current wind turbine design and riblet layouts are based on steady-state flow assumptions and 10-minute SCADA averages, real turbines operate in highly dynamic, turbulent environments characterized by rapid wind fluctuations and dynamic stall behavior.

The project investigates the interaction between riblet microstructures, leading-edge roughness and dynamic flow effects to precisely quantify their impact on energy yield. By combining high-fidelity CFD simulations, wind tunnel testing under dynamic stall conditions, field data from operational turbines and reduced-order modeling, ACE WIND will generate a validated forecast tool capable of predicting static and dynamic riblet effects over the full turbine lifecycle.

Current riblet-based forecasts typically guarantee 1–2% additional power output due to static flow assumptions. ACE WIND aims to increase the reliable and guaranteed performance gain to 3–7% by integrating dynamic stall behavior, surface aging and leading-edge roughness into the simulation process. The resulting ACE WIND tool will enable wind farm operators to calculate site-specific energy yield improvements, optimize riblet layouts and develop robust business cases with significantly reduced simulation costs.

By providing accurate, lifecycle-aware performance forecasts, ACE WIND establishes the foundation for scalable riblet deployment in the global wind energy market. The project strengthens Austrian–Japanese technological cooperation and supports the transition toward higher-efficiency renewable energy systems through digitally optimized, bio-inspired surface engineering.

BellyRibs

Full title of the project:
BellyRibs – Drag Reduction and Mission Endurance Enhancement of Military Transport Aircraft through Laser-Processed Riblet Protection Tapes

Program:
KIRAS 2024-2 – Innovation AKUT (Protection of Critical Infrastructure)

Project partners:
Bionic Surface Technologies GmbH | Austrian Armed Forces (Österreichisches Bundesheer)

About:
BellyRibs investigates the transfer of biomimetic riblet surface technology to military transport aircraft in order to enhance operational endurance and efficiency in missions related to the protection of critical infrastructure. The project combines Computational Fluid Dynamics (CFD), precision laser processing and experimental validation to integrate riblet microstructures into certified 3M Belly Protection Tape used on C-130 aircraft.

Riblets – microscopic, flow-aligned surface structures inspired by shark skin – are known to reduce aerodynamic friction by up to 8% under laboratory conditions. In BellyRibs, this effect is translated into a mission-relevant configuration for C-130 and future C-390 platforms. By laser-structuring existing protective tape, the project merges mechanical belly protection with aerodynamic drag reduction in a single, field-compatible solution.

The expected aircraft-level benefit is a fuel reduction of approximately 0.7–1%, corresponding to a measurable increase in range and time-on-station of 1–2%. For ISR-configured C-390 platforms equipped with Litening 5 pods, this directly enhances surveillance duration and operational resilience during infrastructure protection missions.

The project follows a lean, 12-month development cycle including:

CFD optimisation of riblet layouts for C-130 and C-390
Laser structuring of certified protection tape
Experimental validation at BST’s Pipe Test Bench
Practical demonstration via partial mockup application

By validating a dual-function surface system under operationally relevant conditions, BellyRibs strengthens Austria’s technological sovereignty in flow-optimised surfaces while contributing to increased resilience, reduced fuel consumption and improved crisis response capability.

GreenFlow

Full title of the project:
GreenFlow – Energy Efficiency Enhancement of Hydropower Plants through Biomimetic Riblet Surface Technologies

Program:
Energieforschung 2024 – Produktion der Zukunft, FFG

Project partners:
Bionic Surface Technologies GmbH | Universität für Bodenkultur Wien (BOKU) | Global Hydro Energy GmbH | Kelag | JOANNEUM RESEARCH MATERIALS

About:
GreenFlow develops an innovative retrofit solution for existing hydropower plants by integrating biomimetic riblet microstructures with abrasion-resistant and biofouling-reducing coating systems. Inspired by shark skin, riblet structures reduce wall shear stress and friction losses in water-conducting components such as headrace channels, pressure pipes and turbine elements.

The project combines advanced Computational Fluid Dynamics (CFD), large-area micro-structuring technologies (roll-to-roll and step-&-repeat processes), plasma-based surface activation and durable protective coatings to achieve a measurable reduction in hydraulic losses. Targeted performance improvements include a friction reduction of 8–12 %, resulting in an overall efficiency increase of 2–5 % in existing hydropower systems.

In addition to hydrodynamic optimization, GreenFlow integrates biozidfreie, biomimetic anti-fouling concepts and highly abrasion-resistant coatings to ensure long-term performance stability under sediment-loaded flow conditions. The developed technologies are designed for rapid retrofitting without major structural modifications, enabling amortization periods below three years.

By increasing annual energy production while reducing maintenance requirements and CO₂ emissions, GreenFlow contributes directly to climate-neutral energy generation and strengthens the competitiveness of sustainable hydropower infrastructure.

Bilasurf

Full project title: Bio-Inspired Laser Functionalisation of complex 3D Industrial Surfaces

Program: Horizon Europe

Project webpage: www.bilasurf.com

Information: BILASURF aims at developing and integrating a process for high-rate laser functionalization of complex 3D surfaces using tailored designed bio inspired riblets to reduce friction and improve the environmental footprint of industrial parts | assuring a high throughput with the help of inline monitoring capabilities.

Concluded Projects

Full project title: Surface Technologies for all Electric Air Taxis

Program: Take Off

Partners: Rail Tec Arsenal Fahrzeugversuchsanlage GmbH | Peak Technology GmbH | Austrian Institute of Technology GmbH

Information: SELECT aims to develop and test surface technologies with advanced functions for ice protection and drag reduction for eVTOLs (electric vertical take-off and landing) to maintain flight safety in a wider range of icing conditions, to increase energy efficiency and performance, and to reduce noise emission of all-electric air taxis. The main subsystems that are targeted in SELECT are:(1) the passive Ice Protection System (IPS) to ensure reliable performance at low power demand, and (2) to reduce aerodynamic losses and noise emissions, maintaining high performance. The functional surface technologies will be developed targeted to the needs of the upcoming eVTOL applications.

Full project title: New generation of offshore turbine blades with intelligent architectures of hybrid, nano-enabled multi-materials via advanced manufacturing

Program: Horizon 2020

Project webpage: www.carbo4power.net

Information: Carbo4Power’s main objective is to develop a new generation of lightweight, high strength, multifunctional, digitalized multi-materials for offshore turbine rotor blades that will increase their operational performance and durability while reducing the cost of energy production, maintenance, and their environmental impact.

Full project title: Riblet4Wind

Program: H2020

Project webpage: riblet4wind.eu

Information: The main objective of this project is to transfer a technology that has already demonstrated its ability to increase energy efficiency in aviation to the wind energy industry.
By applying functional coatings with a Riblet structure, the ratio of air resistance to buoyancy of the rotor blades improves considerably, which enables operation at lower wind speeds.
The turbulence behavior of the rotor blades is also improved, which enables operations even at higher wind speeds and / or less optimal wind conditions.

Contributions (see below): “Riblet-Surfaces for improvement of Efficiency of Wind Turbines”

Full title of the project: Turbulence and optical Measurements for Duct Surface Optimization in Turbofans

Program: Beyond Europe | FFG

Partners: Institut für Thermische Turbomaschinen und Maschinendynamik | GE Aviation US GE Aviation India

About: An important key component for increasing the efficiency of aircraft is the turbine transition channel between high- and low-pressure turbines. In many cases, various factors lead to poor flow quality in this area. One of the goals is therefore to gain insight into fluid physics and to characterize the development of turbulence through the canal. Together with the project partners, the potential of resistance-reducing modifications of the surfaces is examined.

Full project title: Coated riblets with antifouling effect for maritime applications

Program: Beyond Europe

Partner: MicroTau Pty Ltd | Joanneum Research Forschungsgesellschaft mbH

Kurzinformation: The project aims at a drastic reduction of hydrodynamic drag through surface modeling of bionic microstructures (so-called Riblets), the development of functional, structurable coatings and large-Riblet-structured surfaces applied on large areas. For the Calamari project, Riblet structures for maritime applications are created in a non-toxic metal-oxide-added, highly elastic paint system (= antifouling paint system) or on flexible foils. The films produced exhibit anti-fouling as well as drag-reducing functionality.

Full project titel: Large Riblet Surface with Super Hardness, Mechanical and Temperature Resistance by Nano Functionalization

Program: Horizon 2020

Project website: www.resistant-project.eu

About: ReSiSTant targets the optimization of two industrial pilot lines by using micro- and nanostructured surfaces for drag reduction. The objectives are to implement new developed surfaces into 1) Aircraft Turbofan Engines and 2) Industrial Compressors. Positive effects by usage of such surface could give benefits in terms of efficiency, CO2 reduction and noise emission and further on a positive economic and ecological impact. To enable the usage of such micro- and nanostructures, special development on the surface material for better durability in rough conditions has to be done. It is planned to do nano-functionalization, like implementing nanostructures and nanoparticles for better resistance in rough conditions.

Full project title: Inspection and Efficiency Assessment Technology

Program: Beyond Europe

Project partners: Austrian Institute of Technology GmbH – Center for Vision | Automation & Control | Graz University of Technology – Institute of Software Development | University of Wyoming – Department of Mechanical Engineering

About: The main objective of RiSPECT is to come up with the foundations behind an automated system for estimating the quality of riblet surfaces based on image data that reduces the overall costs for quality assurance measures within the riblet surface usage. Riblet defects and their impact on the aerodynamic behaviour is studied experimentally and numerically. This information is implemented into an automated optical system to detect the defects of Riblets.

Publications

Leitl, P., Flanschger, A., Rodriguez, A., Andergassen, A. (2024)
"Numerical investigation of the impact of different Riblet angles and their effect on drag reduction"
Conference: AIAA Aviation Forum And Ascend 2024
https://doi.org/10.2514/6.2024-3510

Leitl, P., Garcia de Albéniz, M., Flanschger, A., Robinson, G., Bogue, D. (2024)
"Numerical and experimental investigation of different Riblet layouts and their effect on the engine of a Stratos 716 X Business Jet"
Conference: AIAA Aviation Forum And Ascend 2024
https://doi.org/10.2514/6.2024-3509

Leitl, P., Flanschger, A., Reschenhofer, B., Gruber, R., Kurzthaler, M., Fleder, S., Lenartz, M., Neff, F., Hertz, C. (2024)
"Design and testing of Riblet film on a high-performance axial fan stage"
Conference: AIAA SciTech 2024 Forum
https://doi.org/10.2514/6.2024-1111

Garcia de Albéniz, M., Leitl, P., Flanschger, A. (2023)
"Numerical and experimental investigation of Riblet-Coating impact on centrifugal compressor stage performance"
Conference: ASME Turbo Expo 2023
https://doi.org/10.1115/GT2023-103040

Bilinsky, H.C., Quinn, M., McGrath, D., Whitelock, J., Poudyal, S., Bell, D., Leitl, P., Benauer, R., Feichtinger, Ch. (2023)
"Materials and Performance Testing of DCM Drag-Reducing Riblets for Aviation"
Conference: AIAA SCITECH 2023 Forum
http://dx.doi.org/10.2514/6.2023-1762

Flanschger, A., Heinzelmann, R., Messner, M. (2023)
„Between consultation and control: how incubators perform a governance function for entrepreneurial firms”
Accounting, Auditing & Accountability Journal. Vol. 36, 9, 86 – 107
https://www.emerald.com/insight/content/doi/10.1108/AAAJ-09-2020-4950/full/html

Kohl, D., Tsuchihashi,H., Gruber, R., Pichler, K., Goto, Y., Garcia de Albeniz, M., Naito, K., Flanschger, A., Ichinose, G. (2023)
"Numerical and experimental investigation of Riblet application on a helicopter rotor blade"
Conference: AIAA SCITECH 2023 Forum
https://doi.org/10.2514/6.2023-1765

Leitl, P., Feichtinger, Ch., Schatzdorfer, G., Flanschger, A. (2023)
"Numerical study of riblet defects and their impact on performance"
https://doi.org/2514/6.2023-1764

Leitl, P., Garcia de Albéniz, M., Smoker, J., Flanschger, A. (2023)
"Numerical and experimental investigation of different Riblet layouts on a Stratos 716 X business jet"
Conference: AIAA SCITECH 2023 Forum
https://doi.org/10.2514/6.2023-1952

Benauer, R., Schreck, St., Leitl, P., Badžek, E., Patinios, M., Farisco, F. (2022)
"A Numerical Study on the Effects of Circumferential Positions of Combustor Hot Streaks on a TCF Configuration"
https://doi.org/10.1115/GT2022-82419

Garcia de Albeniz Martinez, M.L., Leitl, P., Costa, D., Flanschger, A. Forster, B. (2022)
"Numerical Investigation and Application of Riblets within the Safety Analysis and following Execution of the stunt Tunnel Flight"
Conference: AIAA AVIATION 2022 Forum
https://doi.org/10.2514/6.2022-3664

Leitl, P., Flanschger, A., Garcia de Albéniz, M., Rodriguez, A., Pereira, A., Forster, B. (2022)
"Investigation of the impact of different Riblet layouts on a long- and medium-range Aircraft model"
AIAA 2022-0919, Special Session: Drag-Reducing Surfaces I.
https://doi.org/10.2514/6.2022-0919

Leitl, P., Flanschger, A., Ortiz de Viñaspre, I., Pereira, A. (2022)
"Investigation of the impact of different riblet technologies and its application on a Boeing 777 airplane model"
Conference: AIAA SCITECH 2022 Forum
https://doi.org/10.2514/6.2022-0919

Leitl, P., Shiraishi, M. Flanschger, A., Tsuchihashi, S., Marn, A., Schreck, St., Ichinose, G., Shibazaki, Y., Benauer, R. Pramstrahler, S. (2022)
"Numerical and Experimental Investigation of Lasered Riblets on Turbine Exit Guide Vanes and the Impact on the Performance"
Conference: AIAA SCITECH 2022 Forum
https://doi.org/10.2514/6.2022-0917

Leitl, P., Feichtinger, Ch., Wotawa, F., Naughton, J. (2022)
"Measurements of macroscopic and microscopic Riblet defects and their impact on performance"
Conference: AIAA SCITECH 2022 Forum
https://doi.org/10.2514/6.2022-0916

Pramstrahler, S., Peters, A., Garcia de Albéniz, M.L., Leitl, P.A., Heitmeir, F. Marn, A. (2022)
"The Impact of Inlet Flow Angle on Turbine Vane Frame Aerodynamic Performance"
Conference: ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition
https://doi.org/10.1115/GT2022-78065

Quinn, M., McGrath, D., Bell, D., Bilinsky, H., Builth-Williams, J., Feichtinger, Ch., Leitl, P.A., Flanschger, A., Shahjahan, S. (2022)
"Advancements in Drag-Reducing Riblet Film Production for Aviation and Other Applications"
Conference: AIAA SCITECH 2022 Forum
https://doi.org/10.2514/6.2022-0920

Leitl, P.A., Feichtinger, Ch., Bilinsky, H., Flanschger, A., Quinn, M., Ortiz de Viñaspre, I., Forster, B. (2021)
"Riblet design, manufacturing, and measurements – A new rapid iteration process"
Conference: AIAA Scitech 2021 Forum
https://doi.org/10.2514/6.2021-0036

Leitl, P., Feichtinger, Ch., Kowalik, Y., Reschenhofer, B., Merli, F., Brinkmann, A., Flanschger, A., Göttlich, E., Stenzel, V. Marn, A. (2021)
"Performance improvement of Riblets in a Turbine Center Frame and their material development for high temperature environments"
Project: TURANDOT - Turbulence and Optical Measurements for Duct Surface Optimization in Turbofans, Conference: AIAA Scitech 2021 Forum
https://doi.org/10.2514/6.2021-0033

Leitl, P., Feichtinger, Ch., Naughton, J., Flanschger, A., Husen, N., Ortiz de Viñaspre, I., Mier, F., Forster, A. (2021)
"Measurement of riblet defects and their impact on performance"
Conference: AIAA Scitech 2021 Forum
https://doi.org/10.2514/6.2021-0034

Leitl, P.A., Flanschger, A., Garcia de Albéniz, M., Piscitelli, G., Ferrante, E., Costa, E. (2021)
"Riblet Surfaces for Performance Increase in Aircraft Turbines"
Conference: 2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)
https://doi.org/10.1109/ICMAE52228.2021.9522394

Leitl, P.A., Feichtinger, Ch., Flanschger, A., Ortiz de Viñaspre, I., Forster, A., Naughton, J.W., Husen, N., Mier F.A. (2021)
"Measurement of riblet defects and their impact on performance"
AIAA Paper 2021- 0119
https://doi.org/10.2514/6.2021-0034

Leitl, P.A., Göttlich, E., Flanschger, A., Peters, A., Feichtinger, Ch.,Marn, A., Reschenhofer, B. (2020)
"Numerical investigation of optimal riblet size for turbine center frame strut flow and their impact on performance"
Session: Special Session: Engineered Surfaces, Materials, and Coatings for Viscous Drag Reduction AIAA 2020-0307
https://doi.org/10.2514/6.2020-0307

Leitl, P.A., Stenzel, V., Flanschger, A., Kordy, H., Feichtinger, Ch. Kowalik, Y., Schreck, St., Stübing, D., (2020)
"Riblet Surfaces for Improvement of Efficiency of Wind Turbines"
Conference: AIAA Scitech 2020 Forum
https://doi.org/10.2514/6.2020-0308

Leitl, P.A., Göttlich, E., Flanschger, A., Peters, A., Feichtinger, Ch., Marn, A., Reschenhofer, B. (2020)
"Numerical investigation of optimal riblet size for TCF strut flow and their impact on the performance"
AIAA paper 2020-0307, Jan. 2020
https://doi.org/10.2514/6.2020-0307

Schreck, St. (2020)
"Influence of the circumferential position of combustor hot streaks onto the performance of a TCF"
Masterarbeit Graz: Institute of Thermal Turbomachinery and Machine Dynamics

AIAA Scitech Forum and Exposition 2020
“Numerical investigation of optimal Riblet size for TCF strut flow and their impact on performance” – Florida, 2020

AIAA Scitech Forum and Exposition 2020
“Riblet surfaces for improvement of Efficiency of Wind turbines” – Florida, 2020

Benauer, R., Fraundorfer, F., Leitl, P., Mohr, L. (2019)
"Damage Estimation of Explosions in Urban Environment by Simulation"
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-3/W8, Gi4DM International Conference
https://doi.org/10.5194/isprs-archives-XLII-3-W8-253-2019

Costa, E., Garcia de Albéniz, M., Barberis, St., Leitl, P. (2019)
"Increase of Compressor Performance through the Use of Microstructures"
SAE Technical Paper 2019-24-0239, Conference: Conference on Sustainable Mobility
https://doi.org/10.4271/2019-24-0239

Costa, E., Piscitelli, G., Ferrante, E., Leitl, P., Flanschger, A., Garcia de Albéniz, M.L. (2019)
"Incremento delle prestazioni di un compressore mediante microstrutture"
A&C Análisis & Calcolo, N. 94, 56-62
https://aec-analisiecalcolo.it/pubblicazioni/aec/94/incremento-delle-prestazioni-di-un-compressore-med

Leitl, P., Garcia de Albéniz, M.L., Flanschger, A. (2019)
"Increase of Compressor Performance through the Use of Microstructures"
SUPEHR 19
https://doi.org/10.4271/2019-24-0239

Leitl, P.A., Kuntzagk, St., Flanschger, A., Pfingsten, K. (2019)
"Experimental and numerical investigation of the reduction in skin friction due to riblets applied on the surface of a Taylor-Couette cell"
AIAA SciTech Forum and Exposition 2019-1625
https://doi.org/10.2514/6.2019-1625

Hafizovic, A., Heitmeir, F., Leitl, P., Marn, A., Simonassi, L., Zenz, M. (2019)
"Aeroacoustical and Aerodynamical investigations of Riblets applied on low pressure turbine exit guide vanes for two different operating points"
ASME Turbo Expo: Turbomachinery Technical Conference and Exposition (GT)
https://doi.org/10.1115/GT2019-90283

Leitl, P.A., Garcia de Albéniz, M.L., Flanschger, A. (2019)
"Nano- and microstructured Riblet surfaces for centrifugal industrial compressors"
Sustainable PolyeEnergy generation and Harvesting: Conference Proceedings, 32-38, Genova: University Press
https://doi.org/10.1400/274691.4610256

Mohr, L., Leitl, P., Fraundorfer, F. (2019)
"Damage Estimation of Explosions in Urban Environments by Simulation"
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information, Vol 42, 3/W8, 253-260
https://doi.org/10.5194/isprs-archives-XLII-3-W8-253-2019

Neumann M., Machado Charry E., Leitl P.A., Hirn U., Zojer K., Schmidt, V. (2019)
"Joint distribution of local porosity and local tortuosity in sack paper"
Proceedings of the international paper physics conference. TAPPI, Indianapolis, 100–105

Reschenhofer, B. (2019)
"Numerical Investigation of the Impact of Riblets on Turbine Center Frames"
Diplomarbeit. Graz: Institute of Thermal Turbomachinery and Machine Dynamics.
https://online.tugraz.at/tug_online/wbabs.showThesis?pThesisNr=68321&pOrgNr=37

Zenz, M., Hafizovic, A., Simonassi, L., Leitl, P.A., Benauer, R., Heitmeir, F., Marn, A. (2019)
"Aerodynamical and aeroelastic investigations of a riblet design applied on the surface of turbine exit guide vanes of a low pressure turbine"
13th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, 55.
https://doi.org/10.29008/ETC2019-055

Zenz, M., Hafizovic, A., Simonassi, L., Leitl, P.A., Heitmeir, F., Marn, A. (2019)
"Aeroacoustical and Aerodynamical Investigations of Riblets Applied on Low Pressure Turbine Exit Guide Vanes for Two Different Operating Points"
Proceedings of the ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, Vol. 2B, V02BT43A001, Phoenix: Arizona.
https://doi.org/10.1115/GT2019-90283

Simonassi, L., Benauer, R., Zenz, M., Leitl, P., Heitmeir, F., Marn A. (2019)
"Numerical and experimental study of the aerodynamic and aeroelastic performance of a low pressure turbine"
European Conference on Turbomachinery Fluid Dynamics and Thermodynamics
https://doi.org/10.29008/ETC2019-056

SUPEHR 2019
“Nano- & Microstructured Riblet surfaces for centrifugal industrial compressors” – Savona, 2019

AIAA SciTech Forum and Exposition 2019
“Experimental and numerical investigation of the reduction in skin friction due to Riblets applied on the surface of a Taylor Couette cell” – Kalifornien, 2019

IntAIRCoat 2019
“Testbench for Riblet Surfaces in Aviation – Experimental and numerical investigation of the reduction in skin friction due to Riblets applied on the surface of a Taylor-Couette cell” – Hamburg, 2019

Bader, P., Leitl, P., Sanz, W., Steinmayr, Ch. (2017)
"The capability of large eddy simulation to predict relaminarization"
International Journal of Heat and Fluid Flow, Vol. 68, 364-372.
https://doi.org/10.1016/j.ijheatfluidflow.2017.09.008

Benauer, R. (2017)
"Numerische Simulation der Schallentstehung und Ausbreitung in modernen Zweikreistriebwerken"
Masterarbeit. Graz: Technische Universität, Institut für Thermische Turbomaschinen und Maschinendynamik.
https://online.tugraz.at/tug_online/wbAbs.showThesis?pThesisNr=62109&pOrgNr=2298

"The capability of large eddy simulation to predict ralaminarization”
International Journal of Head and Fluid Flow, 2017

Bader, P., Sanz, W., Steinmayr, C., Leit. A. (2016)
"Comparison of RANS and Embedded LES Calculations with Measurements of Transitional Flow Along a Flat Plate"
ERCOFTAC Bulletin 2016, JG 106, 03, 84-91
https://www.ercoftac.org/downloads/bulletin-docs/ercoftac_bulletin_106.pdf

Steinmayr, Ch. (2016)
"3D-Simulation von Transition und Relaminarisierung entlang einer ebenen Platte"
Institut für thermische Turbomaschinen und Maschinendynamik, Masterarbeit. Graz. Technische Universität.
https://diglib.tugraz.at/3d-simulation-von-transition-und-relaminarisierung-entlang-einer-ebenen-platte-2016

“3D LES Simulation zur Akustikberechnung von überkritischen Ventilen in Resonanz”
ANSYS Conference & 10. Austrian CDFEM Users’ Meeting 2015

Leitl, P.A. (2015)
"3D LES Simulation zur Akustikberechnung von überkritischen Ventilen in Resonanz"
ANSYS Conference & 10. Austrian CDFEM Users’ Meeting 2015

P. Bader, P Leitl, W. Sanz, C. Steinmayr (2015)
"RANS and eLES Simulations of Relaminarization"

4. VDI Fachkonferenz, Rotor und Rotorblätter von Windenergieanlagen
“Ist die Steigerung der Effizienz von WEA durch strömungsoptimierte Beschichtung möglich” – Bremen, 2014

10. Werkstoffkongress, Next Generation of Materials and Devices from Bioinspiration
“Flow optimization by microstructured surfaces – identification of opportunities and requirements” – Leoben, 2013

OPEN MATERIALS
“Funktionalität, Nutzen und Anwendung von Mikro- und nanostrukturierten Oberflächen zur Reibungsverminderung” – Leoben, 2013

Fachtagung “HAI-TECH”, Bundesministerium für Wirtschaft und Technologie
“Riblets – Praktische Anwendungen und Möglichkeiten” -Berlin, 2012

“CFD-Simulation eines H-Rotors mit variablem Pitchwinkel”
ANSYS Conference & 30. CADFEM Users’ Meeting 2012

Flanschger, A. (2012)
"Controlling in technologiebasierten Jungunternehmen." Bauer, U. (Hrsg.)
Monographic series. Verlag der Technischen Universität Graz

Flanschger, A. (2012)
"Mitbewerberanalyse in der Faserverbundindustrie Europas"
Masterarbeit. Graz: Technische Universität, Institut für Betriebswirtschaftslehre und Betriebssoziologie

Flanschger, A. (2012)
"Controlling von technologiebasierten Jungunternehmen unter spezieller Berücksichtigung der Rolle des Inkubators"
Dissertation. Graz: Technische Universität, Institut für Betriebswirtschaftslehre und Betriebssoziologie

Leitl, P.A., Flanschger, A. (2011)
"Flow optimization by microstructured surfaces in the railway industry"
Identification of opportunities and requirements for high-speed trains
https://www.researchgate.net/publication/295424845_Flow_optimization_by_microstructured_surfaces_in_the_railway_industry_identification_of_opportunities_and_requirements_for_high-speed_trains

Leitl, P.A., Sanz, W., Heitmeir, F. (2011)
“Design and CFD simulation of a booster compressor with volute”
The 9th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

40th Conference on Modern Rolling Stock
“Strömungsoptimierung durch mikrostrukturierte Oberflächen im Eisenbahnwesen, Darstellung von Möglichkeiten und Anforderungen bei Hochgeschwindigkeitszügen” – Graz, 2011

Nano and Photonics 2011
“Development and Usage of micro- and nanostructured bionic surfaces” – Mauterndorf, 2011

Salzburger Dialoge 2011 zur Biokommunikation
“Laminare und turbulente Strömungssysteme. Flow und Chaos” – Salzburg, 2011

4. Weizer Nano Business Talk
“Herstellung und Anwendung von mikro- und nanostrukturierten bionischen Oberflächen – Möglichkeiten und Herausforderungen” – Weiz, 2010

Leitl, P.A. (1997)
"Time Resolved Investigation of Unsteady Flow Inside Inlet Manifolds and Characterization of Inlet Flow Behavior"
Technical Paper 97 2828, SAE International in United States
https://doi.org/10.4271/972828

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