Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Numerical Analysis on Performance of Parallel Type Ejector for High Altitude Simulation

고공 환경 모사를 위한 병렬형 이젝터 구성에 따른 특성 연구

  • Shin, Donghae (School of Aerospace Engineering, Chungnam National University) ;
  • Yu, Isang (School of Aerospace Engineering, Chungnam National University) ;
  • Shin, Minku (School of Aerospace Engineering, Chungnam National University) ;
  • Oh, Jeonghwa (School of Aerospace Engineering, Chungnam National University) ;
  • Ko, Youngsung (School of Aerospace Engineering, Chungnam National University) ;
  • Kim, Sunjin (School of Fire Safety Engineering, Chungnam State University)
  • Received : 2018.09.20
  • Accepted : 2019.01.12
  • Published : 2019.02.01
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Abstract

In this study, the performance and structure of a parallel ejector comprised of multiple single ejectors were confirmed through numerical analysis. The same design variables (mass suction ratio, compression ratio, and expansion ratio) relevant to the performance of a single ejector were considered in the design of the parallel ejector. Analytical results showed that there was no significant difference in the performance of either system related to the operating mass suction ratio; however, the systemsize was significantly reduced. In addition, it was confirmed that when ejectors of the same performance capacity are arranged in parallel, the combined mass suction ratio is lower than that of the single ejector, allowing a lower pressure to be realized. The results of the analysis indicated that the parallel ejector's performance is not significantly different from that of any single ejector, but confirmed that the parallel ejector can offer a configurationdependent advantage in size and operation.

본 연구에서는 수치해석을 활용하여 여러 개의 이젝터로 구성된 병렬형 이젝터의 성능과 구조에 대한 특성을 확인하였다. 병렬 이젝터의 설계는 단일 이젝터와 동일한 설계 변수(질량 흡입비, 압축비, 팽창비)를 사용하였다. 해석 결과에 의하면, 병렬형과 단일 이젝터의 작동 질량 흡입비의 비가 같을 경우에는 성능에 있어 큰 차이를 보이지 않았으나, 시스템의 크기가 작아지는 이점이 있음을 확인하였다. 또한, 동일 성능의 이젝터를 병렬로 배치하였을 때는 질량 흡입비가 단일 보다 감소하여 더 낮은 압력을 구현하는 것을 확인하였다. 해석 결과를 종합하면 병렬형 이젝터 성능은 단일 이젝터와 크게 다르지 않으나, 병렬형 이젝터 구성에 따라서는 크기와 작동에 이점이 있음을 확인하였다.

Keywords

References

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