한국추진공학회:학술대회논문집 (Proceedings of the Korean Society of Propulsion Engineers Conference)
- 한국추진공학회 2009년도 춘계학술대회 논문집
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- Pages.267-274
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- 2009
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- 1975-342X(pISSN)
전단 유동에 의한 스월 제트의 미립화 및 분무특성 향상
The Advancement of Breakup and Spray Formation by the Swirl Spray Jets in the Low Speed Convective Flow
초록
아음속 영역의 대류에 평행하게 압력형 스월 제트를 분사시켜 액막 분열 및 액적 크기와 분포를 실험적으로 측정하였다. 대류로 인한 거시적과 미시적인 분무 특성의 영향을 제트
Breakup and spray formation of pressure-swirl liquid jets injected into a low-speed convective-flow are experimentally investigated. Effects of the cross-flows on the macroscopic and microscopic spray parameters are optically measured in terms of jet Weber number and liquid-to-gas momentum ratio. The liquid stream undergoes Rayleigh jet breakup at lower jet Weber numbers and a liquid sheet isn't formed because of the weak radial velocity in the swirl jet. At higher jet Weber numbers, the macroscopic spray parameter is a very weak function of the momentum ratio but the effect of the convection on the microscopic spray parameter is significant through the secondary breakup with increasing in the liquid-to-gas momentum ratio. The convective-flow promotes bag/plume breakup and the spray formation, and its effect is more distinct at higher momentum ratio.