ANALYSIS OF A NOVEL DOUBLE FUNNEL PORT SOLID ROCKET PROPELLANT GRAIN CONFIGURATION FOR ACHIEVING IMPROVED NEUTRALITY

摘要

In the present paper a double funnel port grain configuration is studied in detail. The neutrality of the grain configuration is compared with the neutrality of a single funnel port grain configuration. After optimization of double funnel port grain dimensions to achieve maximum neutrality, the predicted pressure -time profile of realized grain is compared with the achieved pressure-time profile from rocket motor static testing. A close match was obtained between the two profiles. Thus, double funnel port grain configuration is established which can be utilized for estimating burning rate of propellant compositions at any desired pressure with good neutrality.