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http://dx.doi.org/10.5139/JKSAS.2009.37.4.392

Thrust modulation performance analysis of pintle-nozzle motor  

Kim, Joung-Keun (국방과학연구소 1기술본부 6부)
Park, Jong-Ho (충남대학교 BK21 메카트로닉스사업단)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.4, 2009 , pp. 392-398 More about this Journal
Abstract
Theoretical thrust equations for the diverse nozzle expansion condition were derived. By using the obtained thrust equations, parametric studies were carried out to estimate the effect of pressure exponent, minimum operation pressure, ambient pressure and extinguishment pressure on thrust modulation performance in pintle-nozzle solid rocket motors. Analysis results showed that thrust turndown ratio can be easily attained by small nozzle-throat area variation at high pressure exponent, low minimum operation pressure, high ambient pressure and high extinguishment pressure condition. At those conditions, the highest chamber pressure to obtain the intended thrust turndown ratio can be minimized.
Keywords
Pintle nozzle; Under-expansion; Over-expansion; Nozzle Pressure Ratio; Nozzle Expansion Ratio;
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