A RESEARCH STUDY TO ADVANCE THE STATE-OF-THE-ART OF SOLID PROPELLANT GRAIN DESIGN
Abstract
Four approaches for incorporating head and aftend effects on burning surfaces into the computer program, previously described were evaluated. A modified Quasi-Two-Dimensional approach, in which the initial head-end three dimensional burning surface is approximated by a number of planes, and the burning of each of these planes is then evaluated, was selected. The effects of aft-end burning are considered by adapting the present straight-through grain evaluation computer program at the aft-end to consider a variable propellant outside diameter. Photostress evaluations of engine grain designs having star and cylindrical perforated configuration with similar web ratios are described. Results obtained from applying a theoretical elastic analysis to the engine grains used in the Photostress study are reported. An experimental program to determine the effects of propellant defects on engine performance is described. Heat transfer studies were performed to duplicate numerically and by electrical analog the actual thermal conditioning history of an engine grain for which experimental thermal response data was obtained. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 13, 1961
- Accession Number
- AD0267331