Burning rate measurement of composite propellant using acoustic wave emission in comparison with other techniques

Abstract

The burning rate of rocket propellants is one of the most important parameters having a direct influence on itsballistic characteristics, so accurate measurement of thisparameter is an active approach for achieving optimum design of the solid rocket motors. In this paper, acoustic emission technique was applied for measuring the burning rate of a composite propellant and tests were performed on a wide Pressure range(5 -9 MPa) at ambient temperature.3 % as a deviation co-efficient of acousticemission technique wasinvestigated by comparingthe burning rate results obtained by this technique and those obtained byactual burning of a small-scale test motors at 6.894MPa (1000 PSI) and curves obtained from previously mentioned techniques were analyzed.This paper reports that theacoustic emission technique is a simple, effective, economic, time-saving, reliable technique with a high accuracy nearly equivalent to the active field resultsand it is suitable for quality control of large-scale productions of composite propellant..

Hybrid Modeling Method of SDR Interstage Valve Based on Mechanism and Data-Driven

“…In addition, it was also pointed out that because the manufacturers mainly used noninsulated gas generators in the test process for the C r , the heat loss was relatively significant; Hence, the nominal value of the measured C r was lower than the actual value. When the pressure index ðnÞ is constant, the logarithm of the burning rate ðrÞ and the logarithm of the pressure ðP g Þ are approximately linear [29,30]. However, the n is not an absolute constant in the existing system.…”