| Citation: | LYU Meng, YANG Yang, LYU Le, et al. Numerical simulation and mechanism analysis of jet atomization in the whole process of aircraft drainage[J]. Journal of Aerospace Power, 2026, 41（4）：20240203 doi: 10.13224/j.cnki.jasp.20240203
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To accurately predict the external liquid-discharge trajectory of an aircraft, a jet-breakup simulation model was established by using the VOF to DPM approach to capture the initial morphology of the discharged liquid jet. Based on droplet-breakup mechanisms and particle ballistics, a computational program was developed to predict the settling trajectories of the atomized droplets. The mechanisms of initial jet breakup and subsequent droplet atomization under coupled incoming airflow effects were also analyzed. Results showed that the proposed full-process droplet-motion model effectively accounted for both primary liquid breakup and secondary atomization. Calculation errors for jet morphology and droplet settling trajectories were below 5%. The model successfully predicted the discharge path and spatial droplet-size distribution across full flight conditions, including ground roll, climb, and high-speed cruise, thus providing a reliable technical support for aircraft airworthiness compliance verification.
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