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Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield

Seltner, Patrick M. ; Willems, Sebastian ; Gülhan, Ali ; Stern, Eric C. ; Brock, Joseph M. ; Aftosmis, Michael J.

Experiments in fluids, 2021-09, Vol.62 (9), Article 182 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield
Autor: Seltner, Patrick M. ; Willems, Sebastian ; Gülhan, Ali ; Stern, Eric C. ; Brock, Joseph M. ; Aftosmis, Michael J.
Assuntos: Aerodynamic coefficients ; Aerodynamic loads ; Aerodynamic stability ; Aerodynamics ; Attitude stability ; Cylindrical bodies ; Engineering ; Engineering Fluid Dynamics ; Engineering Thermodynamics ; Fluid- and Aerodynamics ; Free flight ; Heat and Mass Transfer ; High speed ; Hypersonic Flight ; Hypersonic flow ; Hypersonic wind tunnels ; Mathematical models ; Post-production processing ; Research Article ; Rotating cylinders ; Space debris ; Static stability ; Topology
É parte de: Experiments in fluids, 2021-09, Vol.62 (9), Article 182
Descrição: The influence of the flight attitude on aerodynamic coefficients and static stability of cylindrical bodies in hypersonic flows is of interest in understanding the re/entry of space debris, meteoroid fragments, launch-vehicle stages and other rotating objects. Experiments were therefore carried out in the hypersonic wind tunnel H2K at the German Aerospace Center (DLR) in Cologne. A free-flight technique was employed in H2K, which enables a continuous rotation of the cylinder without any sting interferences in a broad angular range from 0 ∘ to 90 ∘ . A high-speed stereo-tracking technique measured the model motion during free-flight and high-speed schlieren provided documentation of the flow topology. Aerodynamic coefficients were determined in careful post-processing, based on the measured 6-degrees-of-freedom (6DoF) motion data. Numerical simulations by NASA’s flow solvers Cart3D and US3D were performed for comparison purposes. As a result, the experimental and numerical data show a good agreement. The inclination of the cylinder strongly effects both the flowfield and aerodynamic loads. Experiments and simulations with concave cylinders showed marked difference in aerodynamic behavior due to the presence of a shock–shock interaction (SSI) near the middle of the model. Graphic abstract
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield

Seltner, Patrick M. ; Willems, Sebastian ; Gülhan, Ali ; Stern, Eric C. ; Brock, Joseph M. ; Aftosmis, Michael J.

Berlin/Heidelberg: Springer Berlin Heidelberg

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