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http://dx.doi.org/10.5139/JKSAS.2008.36.8.790

Investigation of Pintle Shape Effect on the Nozzle Performance  

Kim, Joung-Keun (국방과학연구소 1기술본부 6부)
Park, Jong-Ho (충남대학교 BK21 메카트로닉스사업단)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.8, 2008 , pp. 790-796 More about this Journal
Abstract
Typical solid rocket motors have a fixed propellant grain shape and nozzle throat size resulting in a fixed motor thrust. Pintle nozzle has been suggested as a means of providing variable thrust while maintaining the inherent advantage of solid rocket motors. In this study, the pintle shape effect on nozzle performance is investigated using experimental-aided Computational Fluid Dynamics(CFD). The pintle shape is modified by a principle of monotony. CFD analysis is performed using Fluent by applying the turbulent model. This analysis indicates that nozzle thrust and pintle load are influenced by change of nozzle shock pattern and flow separation due to pintle shape and there exists a high-performing pintle shape.
Keywords
Thrust Throttling; Pintle Nozzle; Nozzle Expansion ratio; Orifice;
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