한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제24권6호
  • /
  • Pages.1-9
  • /
  • 2020
  • /
  • 1226-6027(pISSN)
  • /
  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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1.5톤급 액체-액체 핀틀 분사기 연소시험에서의 핀틀 팁 열손상 원인 분석

Analysis of Pintle Tip Thermal Damage in the Combustion Hot Firing Test with a 1.5-tonf Class Liquid-Liquid Pintle Injector

  • Kang, Donghyuk (Combustion Chamber Team, Rocket Engine Development Office, Korea Aerospace Research Institute) ;
  • Hwang, Dokeun (Combustion Chamber Team, Rocket Engine Development Office, Korea Aerospace Research Institute) ;
  • Ryu, Chulsung (Combustion Chamber Team, Rocket Engine Development Office, Korea Aerospace Research Institute) ;
  • Ko, Youngsung (School of Aerospace Engineering, Chungnam National University)
  • 투고 : 2020.07.20
  • 심사 : 2020.10.22
  • 발행 : 2020.12.31
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초록

케로신/액체산소를 추진제로 하는 직사각형 2열 오리피스를 갖는 1.5톤급 액체-액체 핀틀 분사기를 설계 및 제작하여 액체로켓엔진의 실운용 조건인 초임계 상태에서 핀틀 분사기의 연소성능 및 연소 안정성 검증 연소시험을 수행하였다. 연소시험결과 연소실 내부의 고혼합비 재순환 영역에서 생성되는 고온의 연소가스에 핀틀 팁이 손상되었다. 핀틀 팁으로 전달되는 열유속 또는 하중에 대한 냉각 성능을 증가시키기 위해 핀틀 분사기 내부에 인서트 노즐을 설치하였다. 연소시험 결과 인서트 노즐의 설치, AR 및 BF가 핀틀 팁 냉각 성능에 큰 영향을 주는 인자로 확인되었다.

Using kerosene and liquid oxygen, 1.5-tonf class liquid-liquid pintle injector with rectangular two-row orifice was designed and manufactured. The combustion test of the pintle injector was carried out to verify the combustion performance and combustion stability under a supercritical condition which is the actual operation condition of the liquid rocket engine. The combustion test result showed that the pintle tip was damaged by the high temperature combustion gas in the high-mixed ratio recirculation zone of the combustion chamber. To solve this problem, the insert nozzle was installed in the pintle injector to increase cooling performance at the pintle tip. As a result of the hot firing test, installation of the insert nozzle, AR and BF had a great effect on pintle tip cooling performance.

키워드

참고문헌

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