Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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A Visualization of the Spray from Small Liquid-rocket Engine Injector by Dual-mode Phase Doppler Anemometry

이중모드 위상도플러 속도계측기법에 의한 소형 액체로켓엔진 인젝터 분무의 가시화

  • 정훈 (부경대학교 대학원 에너지시스템공학과) ;
  • 김정수 (부경대학교 기계공학과) ;
  • 배대석 (부경대학교 기계공학과) ;
  • 권오붕 (부경대학교 기계공학과)
  • Received : 2010.12.14
  • Accepted : 2010.12.29
  • Published : 2010.12.31
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Abstract

A focus is given to the breakup behavior of spray droplets issuing from a nonimpinging-type injector. The analysis has been carried out experimentally by means of the dual-mode phase Doppler anemometry (DPDA). Spray characteristic parameters in terms of axial velocity, mean diameter, velocity fluctuation, and span (width of the size distribution) of droplets are measured down the geometric axis of a nozzle orifice and on the plane normal to the spray stream with the injection pressure variations. As the injection pressure increases, the velocity and its fluctuation become higher, whereas the droplet sizes get smaller. It is also shown that the magnitudes of those parameters are smoothed out by dispersion when the droplets move downstream as well as outwardly. The atomization process is significantly influenced by the injection pressure rather than the traveling distance in the experimental condition presented.

Keywords

References

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