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http://dx.doi.org/10.6108/KSPE.2018.22.3.028

Steady and Unsteady State Characteristics of Length Effects about Linear Pintle Nozzle  

Jeong, Kiyeon (PGM Tech R&D Lab, LIG Nex1 Co., Ltd.)
Kang, Dong-Gi (PGM Tech R&D Lab, LIG Nex1 Co., Ltd.)
Jung, Eunhee (PGM Tech R&D Lab, LIG Nex1 Co., Ltd.)
Lee, Daeyeon (PGM Tech R&D Lab, LIG Nex1 Co., Ltd.)
Kim, Dukhyun (PGM Tech R&D Lab, LIG Nex1 Co., Ltd.)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.3, 2018 , pp. 28-39 More about this Journal
Abstract
In this study, numerical simulations were performed for steady and unsteady state characteristics of length effects on linear pintle nozzles using the overset grid method. Nozzles and pintles are created separately by an auto grid generation program to use the overset grid method. Appropriate turbulent models and numerical methods are selected for the validation of simulations. Pintle shapes are chosen from five types, with differences in the ratio of length and diameter. The longer the pintle length, the greater the thrust and thrust coefficient. The chamber pressure tendency of steady-state and unsteady-state are different for various pintle velocities. The thrust of the nozzle exit responds to changes in the nozzle throat in the unsteady-state, and the speed of pressure propagation wave generated by movement of the pintle is considered to predict the major factor of performance.
Keywords
Linear Pintle Nozzle; Unsteady State Characteristics; Pintle Velocity; Chamber Pressure Propagation;
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Times Cited By KSCI : 1  (Citation Analysis)
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