Long wavelength asymptotics of stationary crossflow instability in incompressible and compressible boundary-layer flows

1996 ◽  
Author(s):  
Meelan Choudhari
Keyword(s):  
Boundary Layer ◽  
Compressible Boundary Layer ◽  
Boundary Layer Flows ◽  
Long Wavelength ◽  
Crossflow Instability ◽  
Long Wavelength Asymptotics

Three-dimensional laminar compressible boundary layers with large injection

1975 ◽  
Vol 71 (4) ◽  
pp. 711-727 ◽  
Author(s):  
C. S. Vimala ◽  
G. Nath
Keyword(s):  
Boundary Layer ◽  
Swirling Flow ◽  
Three Dimensional ◽  
Large Mass ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Compressible Boundary Layer ◽  
Boundary Layer Flows ◽  
Compressible Boundary Layers ◽  
Layer Flow

The effect of large mass injection on the following three-dimensional laminar compressible boundary-layer flows is investigated by employing the method of matched asymptotic expansions: (i) swirling flow in a laminar compressible boundary layer over an axisymmetric surface with variable cross-section and (ii) laminar compressible boundary-layer flow over a yawed infinite wing in a hypersonic flow. The resulting equations are solved numerically by combining the finite-difference technique with quasi-linearization. An increase in the swirl parameter, the yaw angle or the wall temperature is found to be capable of bringing the viscous layer nearer the surface and reducing the effects of massive blowing.

On the laminar compressible boundary layer with stationary origin on a moving flat wall

1967 ◽  
Vol 63 (3) ◽  
pp. 871-888 ◽  
Author(s):  
J. A. D. Ackroyd
Keyword(s):  
Boundary Layer ◽  
Stationary Point ◽  
Boundary Layer Flow ◽  
Free Stream ◽  
Compressible Boundary Layer ◽  
Boundary Layer Flows ◽  
Finite Velocity ◽  
Flat Wall ◽  
Moving Wall ◽  
Layer Flow

SummaryThe growth of the laminar compressible boundary layer on a moving flat wall is considered analytically for the case of zero velocity in the free stream outside the boundary layer. The results of this analysis are compared with other published results for the cases in which the free stream has some finite velocity. In all the cases considered in the present paper, the boundary layer is taken to originate at some stationary point on the moving wall. This type of boundary-layer flow occurs behind moving shock waves and it is argued that the case of particular interest in the present paper, that of the stationary gas outside the boundary layer, provides bounding values of such parameters as displacement and momentum thicknesses for shock-induced laminar boundary-layer flows.

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