ANALYTIC PERFORMANCE PREDICTION OF ABLATING HEAT SHIELDS,
Abstract
Preliminary design estimates of ablating heat shield performance have been hampered by the lack of a closed form solution of transient heat conduction in a finite slab with a receding boundary. Several expressions have been generated by an inverse technique in which relatively standard solutions of transient conduction with fixed boundaries are examined and the locus of points at a given (ablation) temperature is followed as it proceeds rearward from the heated surface. The receding boundary is postulated to coincide with this constant temperature locus and the heat flux necessary to produce this is calculated. The analytic technique is applied to several cases involving triangular heat pulses and the results compared to a more exact digital computer program solution. The amount of material ablated and the thickness required to produce a given backface temperature are in agreement. Prediction of backface temperature is adequate for preliminary design. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0426315
Entities
People
- A. H. Silver