PARAMETRIC STUDY OF ROCKET GRAIN CONFIGURATIONS BY PHOTOELASTIC ANALYSIS
Abstract
This report presents the results of parametric studies on several families of rocket grain configurations obtained by photoelastic analysis. In an earlier paper the authors described a parametric investigation of a family of grains which were defined by three parameters: the number of star points, the port fraction, and the fillet radius factor. In the present investigation the study has been extended to include families requiring four parameters to complete their description. Four additional families have been investigated to determine the effect of (1) slot width, (2) positive wedge angles of the star slot, (3) negative wedge angles of the star slot, and (4) eccentricity of elliptically shaped star tips. In each of the studies it is shown that the rule holds approximately, and empirical formulas similar to the one given above have been derived in some cases. A section on the application of the test results to more general engineering problems is presented. In this section a comparison is made between a recommended method of application and a limited number of numerical solutions obtained via computer analysis. Under the worst set of conditions available, the stress calculations agreed with 10% and the strain within 15%.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0480516
Entities
People
- M. E. Fourney
- R. R. Parmerter