Accession Number ADA581526
Title Effects of Passive Porous Walls on the First Mode of Hypersonic Boundary Layers Over a Sharp Cone.
Publication Date Jan 2013
Media Count 32p
Personal Author S. O. Stephen V. Michael
Abstract A theoretical linear stability analysis is used to consider the effect of a porous wall on the first Mack mode of a hypersonic boundary layer on a sharp slender cone. The effect of curvature and of the attached shock are included for axisymmetric and non-axisymmetric disturbances. The flow in the hypersonic boundary layer is coupled to the flow in the porous layer by the porous wall model admittance. We considered the effect of the phase angle of the admittance of a circular pore model on the first Mack mode. We further considered the effect of two other wall models, a high porosity rectangular mesh microstructure model and a low porosity model comprising of spanwise grooves with varying thickness, on the linear and weakly nonlinear stability of the flow.
Keywords 61102f
Boundary layer
Hypersonic flow
Mack modes
Mathematical analysis
Porous materials
Porous walls
Sharp cones
United kingdom


 
Source Agency Non Paid ADAS
NTIS Subject Category 72E - Operations Research
46B - Fluid Mechanics
Corporate Author Birmingham Univ. (England).
Document Type Technical report
Title Note Final rept. 1 Aug 2012-31 Jan 2013.
NTIS Issue Number 1325
Contract Number FA8655-12-1-2110

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