Accession Number : AD0715258

Title :   Base Flow Analysis of an Axisymmetric Body with a Central Jet.

Descriptive Note : Rept. for May 69-Mar 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF SYSTEMS ENGINEERING OPERATIONS

Personal Author(s) : Hong,Y. S.

Report Date : 20 NOV 1970

Pagination or Media Count : 71

Abstract : A method of predicting the base flow of an axially-symmetric cylindrical vehicle with a single central jet issuing from the base was developed with the application of Korst's two-stream interaction model. Some of the flow variables that can be estimated by this method are the base pressure, the average base gas temperature, and the entrainment rate of the ambient air into the base region. Effects of other variables such as vehicle and nozzle geometry, engine operating conditions, vehicle Mach number and trajectory, gas properties, base mass, and energy bleed can also be investigated systematically. The results obtained by the present method agree well with Thor flight data as well as available wind tunnel data. The method is limited to a case where the mixing layer is fully turbulent and both the external freestream and the central jet stream are supersonic. (Author)

Descriptors :   (*BASE FLOW, MATHEMATICAL PREDICTION), (*LAUNCH VEHICLES, BASE FLOW), AXIALLY SYMMETRIC FLOW, EXHAUST GASES, HEATING, SUPERSONIC CHARACTERISTICS, JETS, BASE PRESSURE, JET MIXING FLOW

Subject Categories : Aerodynamics
      Fluid Mechanics
      Ground Support Sys & Facil For Space Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE