A RESEARCH STUDY TO ADVANCE THE STATE-OF-THE-ART OF SOLID PROPELLANT GRAIN DESIGN
Abstract
A generalized computer program is being developed for determining the geometric and ballistic properties of int rnally burning rocket motor grain designs. The program considers head and aft end web effects as well as the strightthrough portions of the grain. Strain analysis of solid propellant motors was conducted employing the Photostress technique, under steady state thermal loading. The tangential and radial strains on the end faces of four solid propellant motors are analyzed to determine strain concentration factors and the effect of two different web fractions on strains. The effects of various propellant defects on motor performance was studied. Data obtained from high speed photographic coverage of 5-inch CP windowed test motors is presented. The study includes determination of the minimum propellant thickness to protect circular voids from premature ignition, and the resistance of liner to flame propagation through cracks extending into a liner-propellant interface. Heat transfer analyses were made in which numerical and electrical analog techniques are used to simulate the thermal conditioning history of a motor grain. (Autho)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 04, 1962
- Accession Number
- AD0278732