基于多孔介质模型的钾热管数值模拟

Numerical Simulation of Potassium Heat Pipe Based on Porous Medium Model

摘要: 为研究钾热管内传热传质机理，对钾热管进行了数值模拟。建立了固液气三相耦合数学模型。其中对吸液芯液体流动区域采用了多孔介质模型，该模型考虑了液体流动对热管传热性能的影响。利用PHOENICS3.6对数学模型进行数值计算，得到了热管内的稳态工作参数。分析模拟结果得到了钾热管内部各相工质传热、传质机理，并与试验数据进行了比较。结果表明，模拟结果与试验数据符合较好。

Abstract: The numerical simulation of the potassium heat pipe was performed for the purpose of researching the heat and mass transfer mechanisms inside the heat pipe. A three-phase conjugate mathematical model was built for the heat pipe. And the porous medium model was used in the wick region. The effect of liquid flow on heat transfer performance was considered. The mathematical model was solved by PHOENICS3.6 to acquire the steady state operation parameter inside the heat pipe. The heat and mass transfer mechanisms were obtained from analyzing the simulation results. The simulation results are in good agreement with experiment data.