THE HOMOGENEOUS BOUNDARY LAYER AT AN AXISYMMETRIC STAGNATION POINT WITH LARGE RATES OF INJECTION

Technical Report · Thu Dec 01 04:00:00 EST 1960

OSTI ID:4024416

Libby, P A

A theoretical analysis is presented of the boundary layer at an axisymmetric stsgnation point with large rates of air injection. The results of a previous investigation indicated that for localized mass transfer in the stagnation region the rates of injection are considerably greater than those usually treated. The exact stagnation-point boundary-layer equations are integrated numerically for an approximate representation of the gas properties. The two point boundary conditions are treated in a new manner which is useful for vsrious boundary-layer and mixing problems. The exact solutions indicate that for large rates of injection the boundary layer is closely represented by an inner isothermal shear flow and by an exterior relatively thin region in which the flow variables change to their free-stream values. An integral method based on profiles suggested by the exact solutions is developed and shown to lead to accurate predictions of the integral thicknesses which are of interest for a study of the downstream influence of the stagnation point mass transfer. (auth)

• Research Organization: Brooklyn. Polytechnic Inst.
• NSA Number: NSA-15-017059
• OSTI ID: 4024416
• Report Number(s): WADD-TR-60-435
• Country of Publication: United States
• Language: English

Related Subjects

AIR
DIFFERENTIAL EQUATIONS
DIFFUSION
ENGINEERING AND EQUIPMENT
FILMS
GAS FLOW
INJECTION
MIXING
SURFACES
THICKNESS