A model for prediction of burning rate-pressure-crossflow velocity relationships for non-metallized composite propellants containing unimodal oxidizer, given only composition and oxidizer particle size, has been developed. This model embodies many of the concepts used in the Beckstead-Derr-Price model, but contains major modifications, including a postulated columnar diffusion flame bending mechanism for erosive burning. The major part of this paper is devoted to description and discussion of these modifications and to model development. Preliminary predictions of burning rate at various pressures and crossflow velocities have been made (AP)/hydroxy-terminated-polybutadiene (HTPB) formulations, with oxidizer particle diameters of 5, 20, and 200 microns, and compared with data for these formulations. With optimization of three 'free constants' appearing in the model, it is found to give excellent agreement with non-crossflow burning rate data over the entire range of pressures and particle sizes studied. In all cases, however, the predicted sensitivity of burning rate to crossflow velocity is somewhat less than observed experimentally. (DePo)
Model for steady state combustion of unimodal composite solid propellants
Modell der stationaeren Verbrennung zusammengesetzter Festtreibstoffe
AIAA-Papers ; 1-11
1978
11 Seiten, 8 Bilder, 2 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
Non-Steady Combustion of Composite Solid Propellants
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