A three-dimensional numerical study is developed to investigate the heat and mass transfer in the vapour removal channels of a Loop Heat Pipe (LHP). The heat transfer governing equations and the Navier-Stokes equations are solved under steady-state conditions for two vapour removal channel configurations: when the channels are in the wick and when the channels are in the casing. The boundary conditions for both configurations are extracted from numerical simulations using a model of the evaporator in which the modelization of the transfers in the wick is based on a pore network model. The results show that assuming that the vapour temperature in the channels is close to the saturation temperature is acceptable when the channels are within the wick but questionable when the vapour removal channels are within the casing. The simulations also indicate significant variations of the wall temperature between the various channel limiting surfaces. The heat transfer coefficient is different on the various surfaces and cannot be predicted using standard correlations for convective heat transfer in pipes.

开发了一个三维数值研究来研究回路热管 (LHP) 的蒸汽去除通道中的热量和质量传递。热传递控制方程和 Navier-Stokes 方程是在稳态条件下求解两种蒸汽去除通道配置的：当通道在芯中时和当通道在外壳中时。两种配置的边界条件都是从使用蒸发器模型的数值模拟中提取的，其中吸液芯中的转移模型基于孔隙网络模型。结果表明，假设通道中的蒸汽温度接近饱和温度，当通道在芯内时是可以接受的，但当蒸汽去除通道在外壳内时则有问题。模拟还表明不同通道限制表面之间壁温的显着变化。不同表面的传热系数不同，无法使用管道中对流传热的标准相关性进行预测。