Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Study on Spray characteristics of Dual-Manifold Injector with Various Tangential Entries

이중 매니폴드 분사기에서 접선방향 유입구의 변화에 따른 분사특성 연구

  • Lee, Ingyu (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Jeong, Seokgyu (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Yoon, Jungsoo (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Park, Gujeong (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Yoon, Youngbin (School of Mechanical and Aerospace Engineering, Seoul National University)
  • Received : 2015.04.15
  • Accepted : 2015.09.02
  • Published : 2015.10.01
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Abstract

Thrust variation is an essential parameter in a space mission such as landing on an atmosphereless planet or docking a spacecraft. In order to achieve the thrust variation control, using throttleable injector is a representative and general method. A dual-manifold injector, one of throttleable injectors, was used to control mass flow rate. Five kinds of injectors were designed and investigated in order to compare the spray characteristics of the dual-manifold injector with various tangential entries. Spray angles and patterns were measured to determine external flow characteristics and film thicknesses were measured in order to investigate the internal flow patterns.

가변추력은 대기가 없는 행성에 착륙하거나, 우주공간에서의 도킹에 필수적인 것으로 알려져 있다. 추력을 조절하기 위해 질유량 조절이 가능한 분사기를 사용하는 방법이 대표적으로 알려져 있다. 이에 따라 본 연구에서는 추력조절을 위하여 이중매니폴드 분사기를 사용하여 질유량을 조절하였다. 이중매니폴드 분사기의 주요 변수 중 하나로 판단되는 접선방향 유입구의 개수의 변화에 따른 분사특성을 확인하기 위하여 분무각, 분무패턴을 포함하는 외부유동을 측정하였으며 내부유동 특성 파악을 위한 film thickness를 확인하였다.

Keywords

References

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