Accession Number : AD0260181

Title :   SIMPLE FORMULAS FOR STAGNATION-POINT CONVECTIVE HEAT LOADS IN LUNAR RETURN

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : GRANT,FREDERICK C.

Report Date : JUL 1961

Pagination or Media Count : 1

Abstract : Simple formulas are given for the stagnationpoint convective heat loads in lunar return for two operational modes. The two modes of operation analyzed are typical of moderate heating and of nearly minimum heat loads, respectively. The values of the parameters in a simple twoparameter formula for the total-heat load are given in the lift-drag-ratio range of 0.2 to 1.0 and in the peak loading range of 2g to 10g. For vehicles having a lift-drag ratio near 0.5, which is typical of many proposed lunar return vehicles, the nominal mode had about 20 percent more absorption than the nearly minimum mode. (Author)

Descriptors :   *AERODYNAMIC HEATING, *ATMOSPHERE ENTRY, *LUNAR PROBES, CONTROL SYSTEMS, DRAG, FLIGHT PATHS, LIFT, MATHEMATICAL ANALYSIS, REENTRY VEHICLES

Distribution Statement : APPROVED FOR PUBLIC RELEASE