Evaporation thermal anslysis of Swallow-tailed Axial-grooved Heat Pipe

3rd International Conference on Energy Equipment Science and Engineering

Zhang, Renping^1

School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jiangxi

333001, China^1

关键词: Disjoining pressures;    Evaporating liquid film;    Evaporator section;    Heat transfer rate;    Interface temperatures;    Rate of heat transfer;    Thin film regions;    Thin liquid film;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012124/pdf
DOI  :  10.1088/1755-1315/128/1/012124

来源: IOP

【 摘 要 】

A detailed mathematical model that describes evaporating characteristics through thin liquid film at the evaporator section of swallow-tailed axial-grooved heat pipe was developed. The numerical simulation results about thin film profile, liquid-vapour interface temperature, evaporating rate and heat flux at the evaporating thin film region were given by the current investigation and the effect of superheat on the liquid-vapour interface temperature, evaporating mass rate and heat flux was discussed. Meanwhile, thermal model of the meniscus region at the evaporating section was developed to calculate the rate of heat transfer. The ratio of the heat conduction in the evaporating thin liquid film region and total heat rate were also discussed. It is indicated that the thickness of thin liquid film rises in a nearly linear fashion. The disjoining pressure can be neglected with increasing the liquid film thickness, tends to be negligibly small. The heat transfer rate at the intrinsic meniscus cannot be compared with that of the evaporating liquid film region.