Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Study on Design and Performance of an Ejector Using Cold Gas

상온 가스를 이용한 이젝터의 설계와 성능에 관한 연구

  • Yu, Isang (Department of Aerospace Engineering, Chungnam National University) ;
  • Kim, Taewoan (Department of Aerospace Engineering, Chungnam National University) ;
  • Kim, Minseok (Department of Aerospace Engineering, Chungnam National University) ;
  • Ko, Youngsung (Department of Aerospace Engineering, Chungnam National University) ;
  • Kim, Sunjin (Department of Fire safety Engineering, Chungnam State University)
  • Received : 2014.12.26
  • Accepted : 2015.03.14
  • Published : 2015.04.01
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Abstract

This paper describes an ejector design technique which used for simulating low pressure environment corresponding to high altitude. Also the ejector performance characteristics was investigated according to performance and geometric variables by cold gas flow test. Entrainment ratio, compression ratio and expansion ratio were designated as performance variables and an ejector gap ratio was designated as a geometric variable. A relationship between the performance variables to predict the ejector performance was identified and it was confirmed that the performance variables have much more effective than the ejector gap ratio through the ejector cold gas flow test.

본 연구에서는 고고도의 저압환경 구현을 목적으로 사용되는 이젝터의 설계기법을 정립하고 상온가스를 이용한 실험을 통하여 성능변수와 형상변수에 따른 이젝터 작동 특성을 관찰하였다. 유량비, 압축비, 팽창비를 성능변수로 선정하고, 간극비를 형상변수로 선정하여 실험을 수행하였다. 실험결과 이젝터의 성능을 예측할 수 있는 성능변수들의 관계를 파악하였으며, 간극비 보다는 성능변수가 이젝터의 성능에 큰 영항을 미치는 것을 확인하였다.

Keywords

References

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