Aiming at the shortcomings of the existing calculation model in spray cooling

based on mass

momentum and energy conservation equations

the liquid film flow and heat transfer equations of spray cooling in non-boiling region are established

and magnitude analysis method is applied to simplify equations

and numerical method is used to solve the model. Based on the given values of droplet velocity and temperature

the film thickness

average heat flux and liquid outflow temperature are solved by the model

then the calculated results are compared with the experimental results. The comparison results show that the liquid film thickness difference is less than 6%. The difference of average heat flux and final liquid temperature is less than 10%

and the results that difference less than 5% account for more than 60%. The excellent agreement between simulation and experiment confirms that this model can reasonably reflect flow and heat transfer in spray cooling. The calculated results of film thickness and temperature can deepen the understanding of spray cooling heat transfer mechanism.