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System Analysis of Expander Cycle Hydrogen Rocket Engine

팽창기 사이클 수소 로켓엔진의 시스템 해석

  • Received : 2020.07.29
  • Accepted : 2020.09.08
  • Published : 2020.10.31

Abstract

In this study, the program for system analysis of an expander cycle rocket engine using liquid hydrogen as a fuel was developed. The properties of hydrogen were considered by the ratio of isomers with temperature. The analysis procedure was established with the open and closed types of the expander cycle engine and the simulation methods were suggested for each component. To validation of the analysis program, we compared the performance of the engine operating point and the analysis results performed overseas for Vinci and SE-21D, which are expander cycle engines. As a result of the analysis, the main performance factors of the system, such as the mass flow of the propellant, specific thrust, and power, except for some of the inaccurate input information, showed high accuracy with an error of around 1-2%.

본 연구에서는 액체 수소를 연료로 사용하는 팽창기 사이클 로켓 엔진의 시스템 해석을 위한 프로그램을 개발하였다. 수소의 물성치는 온도에 따른 이성질체의 비율을 고려하였다. 팽창기 사이클 엔진의 개방형과 폐쇄형 형식에 따른 해석 절차를 수립하고 부품별 해석 방법을 제시하였다. 본 해석 프로그램의 검증을 위해 팽창기 사이클 엔진인 Vinci와 SE-21D를 대상으로 엔진 작동점의 성능 및 국외에서 수행된 해석 결과와 비교하였다. 해석 결과, 입력 정보가 부정확한 일부를 제외한 추진제의 질유량, 비추력, 동력과 같은 시스템의 주요 성능 인자는 1~2% 내외의 오차로 높은 정확도를 나타내었다.

Keywords

Acknowledgement

이 성과는 2018년도 정부(과학기술정보통신부)의 재원으로 한국연구재단 - 우주기술개발사업의 지원을 받아 수행된 연구임. (NRF-2018M1A3A3A02065851)

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