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A New Test Method to Evaluate Influence of $Al_2O_3$ to Rubber Insulator in Solid Propellant Rocket Motor  

Lee, Hyung-Sik (국방과학연구소 1기술연구본부 6부)
Kang, Yoon-Goo (국방과학연구소 1기술연구본부 6부)
Lim, Soo-Yong (국방과학연구소 1기술연구본부 6부)
Oh, Jong-Yun (국방과학연구소 1기술연구본부 6부)
Lee, Kyung-Hoon (국방과학연구소 1기술연구본부 6부)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.15, no.3, 2011 , pp. 9-14 More about this Journal
Abstract
In solid propellant rocket motors, $Al_2O_3$, one of combustion products, can be accumulated inside a combustion chamber. A special rocket motor was designed and tested to simulate thermal reaction of rubber insulator affected by the deposited slag. We successfully demonstrated through a dynamic radioscopy that the slag was deposited at the location as designed. In this paper we present a new test method which can simulate a high temperature and pressure environment in combustion chamber to evaluate material characteristics of rubber insulator and can provide design data to decide its thickness for a new solid rocket motor. The solid rocket motor, which has an average chamber pressure of 770 psia and a burning time of 50 seconds, was tested. The results show that erosion of EPDM insulator is more affected by a gas velocity rather than by the thermal reaction of slag with a high thermal capacity.
Keywords
$Al_2O_3$; Slag; Solid Rocket Motor;
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