RIBLET TECHNOLOGY
Micro-scale structures
with a large-scale impact.
We develop advanced surface structures, optimized applications, and tailored industrial implementation routes to maximize fluid-dynamic efficiency across demanding operating scenarios.
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15+ Years of Riblet Engineering
Flight-Tested Technology
International IP Portfolio
Scalable Manufacturing
Key Parameters of Surface Structures.
Unlocking the full potential of aerodynamic drag reduction is a complex multi-variable challenge. Riblet performance is determined by an interconnected set of aerodynamic, geometric, and operational parameters. Treating any single factor in isolation, or scaling dimensions without accounting for local flow behavior, compromises overall efficiency. True drag reduction requires resolving these variables as an integrated system, aligning microscopic geometry and flow orientation with local shear dynamics and real-world operating conditions.
Geometry
Size
Orientation
Location
Manufacturing Accuracy
Operation Conditions
The cross-sectional shape determines the interaction with turbulent wall vortices.
Riblet dimensions must match the local flow conditions and wall-shear stress.
Micro- grooves alignment is critical for flow stability and Riblet effectiveness.
Flow conditions vary according to their exact locations and so must Riblets.
Achieving the full potential Riblet potential requires excellent Riblet geometry and precise manufacturing.
Demanding operating environments require durable structures with highest material standards
Advanced Surface Architecture: A Breakthrough in Drag Reduction
Micro-scale grooves aligned with the flow direction interact with the turbulent boundary layer. By lifting and pinning near-wall turbulent vortices away from the surface, they restrict lateral momentum exchange and suppress wall-shear stress, and thereby significantly reduce turbulent skin friction.
Conventional Riblets
Alternating Valley (AV) Riblets
Driven by extensive continuous fluid-dynamic research, BST has evolved this mechanism beyond static, uniform micro-grooves. Our proprietary Alternating Valley (AV) Riblets introduce periodically varying geometries in the flow direction. This structural evolution delivers markedly higher efficiency, unlocking greater drag reduction and more stable performance across real-world operating conditions.
Validated Aerodynamic Superiority.
While other solutions rely on uniform microstructures, our proprietary AV Riblets introduce varying geometries that actively manipulate turbulent boundary layers. Independently validated by the German Aerospace Center (DLR), AV Riblets outperform conventional Riblet solutions. Ongoing optimization and numerical validation projects up to 12% local drag reduction.
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Experimentally validated local Drag Reduction.
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More effective than other Riblet surface solutions.
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Potential efficiency gain at full surface coverage.
Ongoing numerical simulations project up to 12% local drag reduction, unlocking over 50% higher performance versus conventional Riblets and an airframe net gain potential of up to 6%. This next-generation architecture is currently entering a multi-year experimental validation and product development process.
