| Citation: | LIU Kai, LI Zongyu, ZENG Wen, et al. Atomization characteristics of planar prefilming nozzle[J]. Journal of Aerospace Power, 2024, 39（7）：20220062 doi: 10.13224/j.cnki.jasp.20220062
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The effects of Weber number and air-liquid momentum ratio on the atomization characteristics of prefilm nozzle were experimentally studied. The fluctuation shape of oil film is obtained by front photographing with high-speed camera, and the fluctuation frequency of oil film is analyzed by proper orthogonal decomposition method. The oil film thickness is obtained by using the idea of liquid discontinuity, the atomized droplets SMD is measured with PDPA. The results show: The air-liquid momentum ratio has a great effects on the oil film thickness, and the Weber number has a great effects on the oil film fluctuation frequency. The air-liquid momentum ratio increased from 0.75 to 30.39, the minimum oil film thickness decreased from 0.38 mm to 0.15 mm, and the SMD increased from 38.8 μm reduced to 33.5 μm; The Weber number increased from 11.91 to 61.51, the oil film fluctuation frequency increased from 2.9 Hz to 207.0 Hz, the initial atomization distance decreased significantly, and the SMD reduced from 37.1 μm to 24.9 μm.
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