Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Experimental Investigation on the Performance of a Cavitating Venturi According to Upstream and Back Pressure Variation

전단압과 배압 변화에 따른 캐비테이션 벤츄리 성능의 실험적 연구

  • Ahn, Hyun Jong (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Kang, Yun Hyeong (Department of Mechanical Engineering, Graduate School, Pukyong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University)
  • Received : 2021.10.14
  • Accepted : 2021.12.15
  • Published : 2021.12.31
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Abstract

An experimental study was performed for a cavitating venturi supplying a constant rate of flow independent of downstream pressure fluctuations when providing liquid propellant. The venturi was designed and manufactured in order to figure out the performance of the cavitating venturi. Effects of the rear-end shape, upstream pressure, and back pressure on the ratio of downstream to upstream pressure of the venturi as well as the flow-rate were observed. As a result, critical pressure ratio of the venturi, which generally depends only on the configuration of the venturi, was kept at 0.74 regardless of the rear-end shape and the upstream pressure of the venturi.

액체 추진제 공급 시, 하류의 압력변동과 무관하게 일정한 유량을 공급하기 위한 캐비테이션 벤츄리의 실험적 연구가 수행되었다. 캐비테이션 벤츄리의 성능을 파악하기 위해 벤츄리를 설계, 제작하여 후단의 형상, 전단압, 그리고 배압에 따른 유량과 벤츄리 전·후단 압력비를 관찰하였다. 일반적으로 캐비테이션 벤츄리의 구조적인 형상에만 종속하는 벤츄리 임계압력비는 실험결과, 후단의 형상 및 벤츄리 전단압과 관계없이 0.74로 일정함을 확인하였다.

Keywords

Acknowledgement

본 논문은 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업(NRF-2016R1D1A3B01012622)의 연구결과임.

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