• Title/Summary/Keyword: 열 유속

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A Study on Combustion Characteristic with Chamber Pressure in Hybrid Rocket (하이브리드 로켓에서의 압력에 따른 연소특성에 관한 연구)

  • Cho, Jung-Tae;Kim, Gi-Hun;Lee, Jung-Pyo;Kim, Hak-Chul;Park, Seon-Woo;Park, Joon-Hyng;Han, Hee-Soo;Hwang, Jae-Woong;Moon, Hee-Jang;Sung, Hong-Gye;Kim, Jin-Kon
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2008.11a
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    • pp.243-246
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    • 2008

  • The combustion characteristic of solid fuel with chamber pressure were experimentally studied in hybrid combustion. This paper was experimental confirmed whether solid fuel affected not only oxidizer mass flux but also chamber pressure. Poly-Ethylene(PE) was used as fuel, GOX was used as oxidizer. Chamber pressure was controled by nozzle throat diameter 6mm and 9mm. In low oxidizer mass flux, solid fuel regression rate was affected not only oxidizer mass flux but also chamber pressure. As well, the regression rate increase as chamber pressure increase with same oxidizer mass flux.

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Analysis of the thermal fluid flow between the gas torch and the steel plate for the application of the line heating (선상 가열을 위한 가스 토치와 강판 사이의 열유동 해석)

  • Jong-Hun Woo;Jong-Gye Shin
    • Journal of the Society of Naval Architects of Korea
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    • v.39 no.2
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    • pp.52-60
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    • 2002

  • Line heating is a forming process which makes the curved surface with the residual strain created by applying heat source of high temperature to steel plate. in order to control the residual strain, it is necessary to understand not only conductive heat transfer between heat source and steel plate, but also temperature distribution of steel plate. In this paper we attempted to analyze is temperature distribution of steel plate by simplifying a line heating process to collision-effusive flux of high temperature and high velocity, and conductive heat transfer phenomenon. To analyze this, combustion in the torch is simplified to collision effusive phenomenon before analyzing turbulent heat flux. The distribution of temperature field between the torch and steel plate is computed through turbulent heat flux analysis, and the convective heat transfer coefficient between effusive flux and steel plate is calculated using approximate empirical Nusselt formula. The velocity of heat flux into steel plate is computed using the temperature distribution and convective heat transfer coefficient, and temperature field in the steel plate is obtained through conductive heat transfer analysis in which the traction is induced by velocity of heat flux. In this study, Finite Element Method is used to accomplish turbulent heat flux analysis and conductive heat transfer analysis. FEA results are compared with empirical data to verify results.

  • https://doi.org/10.3744/SNAK.2002.39.2.052 인용 PDF KSCI

단상 열사이폰 루프의 작동특성에 관한 연구

  • 이진호;김태열;설신수
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.4
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    • pp.960-970
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    • 1990

  • 본 연구에서는 단상 밀폐 사각형 열사이폰 루프에서 가열부는 일정 열유속으 로 가열되고 냉각부는 일정온도로 냉각될 경우에 대해 루프 경사각도, 종횡비, 작동유 체 종류 및 관 직경변화에 대한 유동 및 온도변동 특성과 이에따른 전열성능 및 안정 작동범위를 실험적으로 조사하였다.

  • https://doi.org/10.22634/KSME.1990.14.4.960 인용 PDF