In consideration of flash of water film

a model to predict the heat transfer in vacuum flash cooling was presented. The flash of water film was modeled based on the film penetration theory. The model was validated by the experimental results provided in this paper

and a favorable comparison was demonstrated with a deviation below 10%. Surface temperature and heat flux were obtained numerically and experimentally

and then analyzed. The heat transfer induced by flash of water film was dominant in high heat flux flash cooling. As spray flow rate increased

cooling performance was improved

but latent heat utilization decreased. The research result would lay theoretical foundation for application of vacuum flash cooling in the aerospace thermal control system.