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http://dx.doi.org/10.5139/JKSAS.2009.37.5.476

Numerical Study of the effect of pintle shape on the thrust level  

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.5, 2009 , pp. 476-482 More about this Journal
Abstract
The effect of pintle shape on the thrust level of pintle-nozzle Solid Rocket Motor(PNSRM) was studied numerically using the Spalart-Allmaras turbulent model of Fluent. Mass flow rate of PNSRM was always less than theoretical value and the extent of decrease in mass flow rate grew in the large pintle because of increase in the relative boundary layer thickness between pintle body and nozzle wall. The bigger pintle size was, the more thrust of pintle tip pressure was obtained. Meanwhile the more thrust of nozzle and chamber pressure decreased. Hence, total thrust of big pintle was less than a small pintle under same throat area condition. Specific impulse was relatively flat for all pintle shape.
Keywords
Pintle; Thrust turndown; Flow esparation; Specific impulse; Shock wave; Boundary layer;
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