Accession Number:

AD0607606

Title:

AERODYNAMIC HEAT TRANSFER TO A MELTING BODY,

Descriptive Note:

Corporate Author:

TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF

Personal Author(s):

• Carrier,G. F.

Report Date:

1958-08-08

Pagination or Media Count:

14.0

Abstract:

When a blunt axially symmetric object is exposed to a sufficiently high speed air stream, the air behind the shock has a very high enthalpy and the object will melt. In order to compute the rate of melting, or any other macroscopic features of the composite flow, both the gas boundary layer flow and the melting body flow must be analyzed. This analysis can most conveniently be carried by 1 assuming an interface temperature, Ti, 2 predicting the gas boundary layer associated with that Ti, 3 predicting the liquid layer flow using as boundary conditions the results of step 2, and 4 selecting the correct Ti as that value which leads to a consistent energy balance. This note contains an analysis of the liquid layer flow for a given, quite general, family of material properties. The interface temperature, Ti, the skin friction at the interface, the evaporation rate at the interface, and the pressure gradient, are taken as known quantities since the latter three items are controlled by the gas layer and are known once Ti is given. Author

Descriptors:

• (*AERODYNAMIC HEATING
• ABLATION)
• (*ABLATION
• THERMODYNAMICS)
• RAREFIED GAS DYNAMICS
• BLUNT BODIES
• MELTING
• BOUNDARY LAYER
• GAS FLOW
• LIQUIDS
• MATHEMATICAL PREDICTION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE