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http://dx.doi.org/10.5139/JKSAS.2011.39.8.744

The stydy on determination method of initial optimal nozzle expansion ratio in pintle solid rocket motor  

Kim, Joung-Keun (국방과학연구소 1기술본부 6부)
Lee, Young-Won (국방과학연구소 1기술본부 6부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.39, no.8, 2011 , pp. 744-749 More about this Journal
Abstract
In this study, determination method of initial optimal nozzle expansion in pintle rocket was investigated. The initial optimal initial nozzle expansion was decided by maximizing the mass-averaged thrust coefficient that is calculated from thrust coefficient of minimum and maximum chamber pressure. The determination of initial optimal initial nozzle expansion was equivalent to that of the minimum propellant mass which was required for obtaining the desired mission performance. The highest pressure, thrust turndown ratio and total impulse ratio effected on the initial optimal nozzle expansion. Among them, total impulse ratio had great influence on the initial optimal nozzle expansion.
Keywords
Pintle rocket; Mass weighted thrust coefficient; Thrust turndown ratio; Total impulse ratio;
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