What is it about?
Invited summary of the inlet case at PAW5 (virtual SciTech, January 2021): an axisymmetric intake in pure cross-flow near a ground plane, instrumented so the intake can rotate and sample more of the ingested flow than a fixed rake. Eleven organizations, 9 CFD solvers, 13 turbulence models, and about 200 solutions, on three cross-flow speeds and four committee meshes plus participant meshes. Codes generally matched the test best at the lowest cross-flow. Two-equation turbulence models tended to match the distortion metric better than one-equation models. At higher cross-flow the windward internal flow separates, the ground vortex interacts with that separation, and most solvers struggle. Moving the outflow boundary farther downstream helped some of the high-cross-flow cases.
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Why is it important?
Ground-vortex ingestion in crosswind is a real engine-inlet problem (distortion, surge margin). This workshop is the community snapshot of which modeling choices still fail once the vortex and a windward separation sit in the same duct.
Perspectives
I was on the workshop-committee side of PAW for several cycles. This one is the inlet/ground-vortex map, not another solver paper.
Zach Davis
Space Dynamics Laboratory
Read the Original
This page is a summary of: Summary of the 5thPropulsion Aerodynamics Workshop: Inlet Cross-Flow Results, January 2022, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2022-0814.
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