A numerical study of Mach 6 boundary layer stabilization by means of a porous surface
Sandham, N.D. and Lüdeke, H. (2009) A numerical study of Mach 6 boundary layer stabilization by means of a porous surface. 47th AIAA Aerospace Sciences Meeting , 5.-8. Jan 2009, Orlando, Florida.
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Direct numerical simulations are carried out of boundary layer flow at Mach 6 over a porous surface, in which a Mack mode of instability is excited. The pores are resolved rather than modelled, allowing an evaluation to be made of the accuracy of simplified one-dimensional models used in previous investigations based on linear stability theory. The simulations confirm the stabilizing effect of porosity. The effect is stronger in the simulations than in the corresponding theory. From comparisons of spanwise grooves, streamwise slots and square pores it appears that the detailed surface structure is not as important as the overall porosity and the hydraulic diameter is able to collapse the results for different pore shapes to good accuracy. When the porous surface consists of fewer larger pores, the flow is noisier, with sound waves generated at the pore edges.
|Document Type:||Conference or Workshop Item (Paper)|
|Additional Information:||Erschienen in: AIAA Journal Vol. 47, No. 9, September 2009|
|Title:||A numerical study of Mach 6 boundary layer stabilization by means of a porous surface|
|In ISI Web of Science:||No|
|Keywords:||Transition control, porous surface, hypersonic, direct numerical simulation|
|Event Title:||47th AIAA Aerospace Sciences Meeting|
|Event Location:||Orlando, Florida|
|Event Type:||international Conference|
|Event Dates:||5.-8. Jan 2009|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W RP - Raumtransport|
|DLR - Research area:||Space|
|DLR - Program:||W RP - Raumtransport|
|DLR - Research theme (Project):||W - Projekt IMENS-3C (old)|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Spacecraft|
|Deposited By:||Dr.-Ing. Heinrich Lüdeke|
|Deposited On:||15 Feb 2010 13:34|
|Last Modified:||15 Feb 2010 13:34|
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