CIESC Journal ›› 2018, Vol. 69 ›› Issue (5): 2014-2022.doi: 10.11949/j.issn.0438-1157.20171067

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Liquid film flow and heat transfer model under spray impact

QI Hang, ZHANG Wei, GONG Liang   

  1. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
  • Received:2017-08-08 Revised:2017-08-08 Online:2018-05-05 Published:2017-11-10
  • Supported by:

    supported by the National Natural Science Foundation of China (51676208).

Abstract:

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.

Key words: spray cooling, flow, heat transfer, computational fluid dynamics,CFD, model reduction

CLC Number: 

  • TK124

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