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

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of an Ejector System for Operation of Chemical Lasers (II) - Optimal Design of the Second-Throat Type Annular Supersonic Ejector -

화학레이저 구동용 이젝터 시스템 개발 (II) - 이차목 형태의 환형 초음속 이젝터 최적 설계 -

  • 김세훈 (한국과학기술원 대학원 항공우주공학전공) ;
  • 진정근 (한국과학기술원 대학원 항공우주공학전공) ;
  • 권세진 (한국과학기술원 항공우주공학과)
  • Published : 2004.10.01
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Abstract

Determination of geometric design parameters of a second-throat type annual supersonic ejector is described. Tested geometric parameters were primary nozzle area ratio, cross-sectional area of second-throat, L/D ratio of second-throat and primary flow injection angle. Varying these four geometric parameters, we build a test matrix made of 81 test conditions, and experimental apparatus was fabricated to accommodate them. For each test condition, the stagnation pressure of primary flow and the static pressure of the secondary flow were measured simultaneously along with their transition to steady operation and finally to unstarting condition. Comparing the performance curve of every case focused on starting pressure, the unstarting pressure and the minimum secondary pressure, we could derive correlations that the parameters have on the performance of the ejector and presented the optimal design method of the ejector. Additional experiments were carried out to find effects of temperature and mass flow rate of the secondary flow.

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References

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