Phase Doppler Particle Analyzer를 이용한 기체주입식 와류형 분사기 연구 = Study on Effervescent Swirl Injector Using Phase Doppler Particle Analyzer

다국어 초록 (Multilingual Abstract)

The effervescent injector has an advantage of having excellent atomization performance even at a low injection pressure-drop. It can also be used as one of several methods for variable throttling of rocket engines. This research was conducted to verify the atomization characteristics when the gas injection method was applied to a closed-type swirl injector. For the measurement of the atomization data, a PDPA(Phase Doppler Particle Analyzer) using an argon laser was used. It was confirmed that the diameter of the generated droplets decreased as the flow rate of the gas increased. In addition, as the flow rate of the gas increased, the velocity of the droplets increased in the recirculation area at the discharge orifice of the swirl injector, and it was confirmed that droplets with a high velocity appeared in the axial direction of the injector.