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http://dx.doi.org/10.5139/JKSAS.2010.38.4.363

A phase transformation model for burning surface in AP/HTPB propellant combustion  

Jung, Tae-Yong (서울대학교 기계항공공학부 대학원)
Doh, Young-Dae (국방과학연구소)
Yoo, Ji-Chang (국방과학연구소)
Yoh, Jack Jai-Ick (서울대학교 기계항공공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.38, no.4, 2010 , pp. 363-368 More about this Journal
Abstract
In the solid rocket propellant combustion, the dynamic phase change from solid to liquid to vapor occurs across the melt layer. During the surface burning, liquid and gas phases are mixed in the intermediate zone between the propellant and the flame to form micro scale bubbles. The known thickness of the melt layer is approximately 1 micron at $10^5$ Pa. In this paper, we present a model of the melt layer structure and the dynamic motion of the melt front derived from the classical phase field theory. The model results show that the melt layer grows and propagates uniformly according to exp(-1/$T_s$) with $T_s$ being the propellant surface temperature.
Keywords
Ammonium Perchlorate; Burning Surface; Melt Layer; Phase Equation; Burning Rate; Solid Propellant;
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