한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제21권2호
  • /
  • Pages.41-47
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  • 2017
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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초저온 질소 분사 핀틀 인젝터 분무의 가시화

Visualization of Cryogenic Nitrogen Spray from a Pintle Injector

  • Lee, Keonwoong (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Son, Min (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Shin, Dongsoo (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Yoon, Youngbin (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University) ;
  • Koo, Jaye (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 투고 : 2016.11.03
  • 심사 : 2017.03.06
  • 발행 : 2017.04.01
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초록

모사추진제로 초저온 액체질소와 기체 질소를 사용하여 핀틀의 개도 및 모사추진제 공급 조건이 초저온 분무에 끼치는 영향을 정성적으로 연구하였다. 액체 공급압력을 고정하고, 핀틀의 개도와 기체 질소의 공급 압력을 변화시켜 실험을 진행하였다. 이미지 가시화는 CCD 카메라를 이용한 Shadowgraph 기법이 사용되었으며, 이미지 후처리를 통해 실험 조건에 따른 분무의 차이를 비교하였다. 액체 질소 단독 분사의 경우 개도가 늘어날 때, 분사속도가 줄어들고 챔버에서의 벤트 압력은 커져 액체질소 시트가 중앙으로 모이는 현상이 관측되었다. 액체질소/기체질소 분무의 경우 이미지 후처리를 통해 서로 실험 조건이 다르지만 Shadowgraph 이미지가 유사하게 나타나는 경우도 분석할 수 있음을 보였다.

By using liquid and gaseous nitrogen as simulants, effects of pintle opening distance and simulant supplying condition on spray from pintle injector were investigated qualitatively. The experiment was performed by fixing the liquid supply pressure and varying the opening of the pintle and the supply pressure of gaseous nitrogen. Shadowgraph method with CCD camera was used for image visualization, and the differences of liquid-gas spray were compared by image post processing. In case of liquid nitrogen single injection, as the opening distance was increased, the injection speed was decreased. Therefore, the end of liquid sheet were converged to the center of spray. In the case of liquid nitrogen/Gaseous nitrogen spray, although shadowgraph images look similar to each other, It is shown that it can be analysed by image post processing.

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참고문헌

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피인용 문헌

  1. Hybrid micromachining using a nanosecond pulsed laser and micro EDM vol.20, pp.1, 2009, https://doi.org/10.1088/0960-1317/20/1/015037