REGIMES OF CONTINUUM FLOW FOR BODIES OF SIMPLE GEOMETRY WITH APPLICATION TO HYPERSONIC GLIDE VEHICLES
GENERAL APPLIED SCIENCE LABS INC HEMPSTEAD N Y
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IN THIS MEMORANDUM THE PROBLEM OF INTERACTION BETWEEN THE ESSENTIALLY INVISCID FLOW AND THE BOUNDARY LAYER ON BODIES OF SIMPLE GEOMETRY IS CONSIDERED. There is discussed first the interaction at the leading edge of an unswept cylinder as the Reynolds number based on the cylinder radius is decreased. The requirements for a plate with a cylindrical leading edge to be considered sharp are then reviewed. The interaction which can occur far downstream of the nose is also discussed. The same concepts are applied to a spherical nose and to swept cylinders. The velocityaltitude regimes which result from these considerations applied to two nose radii, 0.1 and 1 ft, are then compared to flight paths for lightly loaded hypersonic glide vehicles. It is shown that for these vehicles the leading edge flow phenomena are characterized by blunt edge effects and must therefore be studied in terms of first-order corrections to the classica dary layer theory and in terms of viscous shock layers.