| Citation: | Zhang Xiao, Zhu Wei, Hu Haifeng, et al. Simulation and experiment on the atomization performance of liquid-liquid coaxial centrifugal dual injectors[J]. Journal of Aerospace Power, 2026, 41（X）：20260072 doi: 10.13224/j.cnki.jasp.20260072
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To investigate the atomization field of liquid-liquid coaxial centrifugal dual injectors, a cross-scale computational framework based on the VOF-to-DPM （volume of fluid to discrete phase model） method was constructed and validated through comparative analysis with cold-flow experiments. The simulation model achieved a spray cone angle error of within 0.85% and the Sauter mean diameter error of no more than 20%. The study found that for the liquid-liquid coaxial centrifugal injector, an increase in the flow rates of both the inner and outer injectors led to a gradual increase in the spray cone angle, while the droplet size simultaneously decreased in both the interaction and non-interaction zones. The influence of inter-injector distance on the atomization characteristics was also examined. Simulation results for different injectors spacings indicated that as the distance between the spray plumes increased, the spray cone angle gradually increased. The variation pattern of the Sauter mean diameter of the droplets was related to the state of liquid film interaction: when the interaction point lied within a continuous and stable liquid film, a larger injector spacing resulted in a smaller Sauter mean diameter; conversely, when the interaction occurred within an unstable, breaking liquid film, the trend was reversed.
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