Accession Number:

AD0265272

Title:

HELIUM INJECTION INTO THE BOUNDARY LAYER AT AN AXISYMMETRIC STAGNATION POINT

Descriptive Note:

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s):

• FOX,HERBERT
• LIBBY,PAUL A.

Report Date:

1961-09-01

Pagination or Media Count:

1.0

Abstract:

A theoretical analysis of the boundary layer at an axisymmetric stagnation point with large rates of helium injection is presented. The exact stagnation point boundary layer equations are integrated numerically with an approximate representation of the gas properties. The new treatment of the two-point boundary value problem that arises is shown to be useful for various boundary layer and mixing problems. The exact solutions indicate that for large rates of injection the boundary layer can be represented by a thick, inner layer of constant shear, temperature and composition and by a relatively thin outer region in which the flow variables adjust to their free-stream values. An inviscid flow model is shown to lead to accurate predictions of this shear layer and will thus provide sufficiently accurate profiles forfagnation point mass transfer. The heat transfer to the stagnation point is also considered. Tabulations of the solutawlconditions and injection rates are given in an appendix. Author

Descriptors:

• *BLUNT BODIES
• *LAMINAR BOUNDARY LAYER
• AERODYNAMIC HEATING
• BOUNDARY LAYER
• BOUNDARY LAYER CONTROL
• COMPRESSIBLE FLOW
• COOLING
• DIFFERENTIAL EQUATIONS
• HEAT TRANSFER
• HELIUM
• HYPERSONIC FLOW
• INTEGRAL EQUATIONS
• MATHEMATICAL ANALYSIS
• REDUCTION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE