Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on the Internal Flow Characteristics of a Jet Pump for the Smart UAV Fuel System

스마트무인기 연료계통 제트펌프의 내부 유동 특성에 관한 실험적 연구

  • 이윤권 (전북대학교 대학원 정밀기계공학과) ;
  • 이창호 (한국항공우주연구원 스마트무인기개발사업단) ;
  • 최희주 (퍼스텍 주식회사) ;
  • 이지근 (전북대학교 기계항공시스템공학부)
  • Published : 2008.02.05
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Abstract

The jet pumps are widely used to transfer the fuel between the tanks in an aircraft fuel supply system. However detailed design procedures for determining the size of components of the jet pumps are not known so well. In this paper, the flow characteristics of the jet pump, which is applied in the fuel transfer system for the smart UAV (Unmanned Aerial Vehicle), were experimentally investigated using the acrylic jet pump model for the visualization of the internal flow. The pressure distributions within the jet pump were measured, and then the loss coefficients of each part were calculated. The effects of Reynolds number and the distances (S) between the exit of the primary nozzle and the mixing chamber entrance were investigated. In addition, cavitation phenomena were considered through the flow visualization inside the jet pump. As a conclusion from the experiment, the contraction shape of the primary nozzle has a strong effect on the loss coefficient of the nozzle and the cavitation occurrence. Cavitation starts around the nozzle exit, and then it propagates to the full flow fields of the jet pump.

Keywords

References

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