Accession Number : AD0681796

Title :   NOTES ON FLOW REGIMES AND WAKE HEATING OF RE-ENTERING VEHICLE,

Corporate Author : GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CALIF

Personal Author(s) : Stolarik,Eugene

Report Date : 14 SEP 1961

Pagination or Media Count : 81

Abstract : The report discusses the flow regimes and wake heating during reentry. It shows that the slip flow conditions occur at much smaller Reynolds numbers than usually assumed and therefore greatly decrease slip flow's importance. The major flow problems associated with re-entering trajectories are located in the continuum flow regimes. It also provides criteria for occurrences of such phenomena as the disappearance of inviscid flow-layer, sharp shock wave, diffusion and merging of shock wave with boundary layer, distinct slip effects and ceasing of the application of the continuum flow theory. The study of the wake heating in hypersonic flow indicates generally a drop in the heat transfer coefficient after separation and an increase near and behind recompression, with the average over the base flow floor varying from 50 to 120 per cent of the heat transfer coefficient corresponding to an equivalent length of attached flow. The thickness of the on-coming boundary layer has a major effect on the heat transfer coefficients of the wake flow. (Author)

Descriptors :   (*REENTRY VEHICLES, *AERODYNAMIC HEATING), WAKE, HYPERSONIC CHARACTERISTICS, ATMOSPHERE ENTRY, REYNOLDS NUMBER, BOUNDARY LAYER, HEAT TRANSFER COEFFICIENTS, SHOCK WAVES

Subject Categories : Aerodynamics
      Guided Missiles
      Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE