Accession Number:

AD0416749

Title:

HEAT TRANSFER TO SLENDER CONES IN HYPERSONIC FHGGHT,

Descriptive Note:

Corporate Author:

TRW SPACE TECHNOLOGY LABS REDONDO BEACH CALIF

Personal Author(s):

Report Date:

1963-06-01

Pagination or Media Count:

23.0

Abstract:

A formula is developed for the calculation of heat transfer through the turbulent boundary layer on slightly blunted slender cones. The combination of the modified Reynolds analogy with approximate relations between shock layer and free stream con ditions leads to a final equation in which the heat transfer is proportional to the free stream density and velocity raised to the 0.82 and 3.10 powers, respectively. The validity of the ap proach is demonstrated by flow field studies uti lizing the teethod of characteristics which indi cate that the inviscid flow field becomes essen tially independent of axial coorannates at a dis tance of 10 to 20 nose radii downstream of the nose. Because of the simplicity of the relation it is possible to obtain analytical expressions for total heat input during re-entry into the earths atmosphere and also relations for maximum heat transfer rate during entry. Real gas prop erties are used and the equations are shown to be sufficiently accurate for most calculations of heat transfer to the conical part of the body where the flow field assumptions of constant den sity and constant velocity at the edge of the boundary layer are applicable. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE