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设计建立了一套以水为工质的分离式热管系统实验台,系统冷凝端采用水冷套管式换热器.在此实验台基础上研究了不抽真空、有大量不凝性气体存在于分离式热管的凝结放热问题,测定了在不同的入口蒸汽温度、循环蒸汽流量、冷却水进口温度及流量条件下混合气体在圆管内凝结换热的情况,分析了这些参数对换热过程的影响.同时,还对套管内含高分压不凝性气体——空气——的水蒸汽凝结换热物理模型进行了研究,并建立了相应的数学模型.模型中除了质量守恒、动量守恒、能量守恒和界面控制方程外,还增加了流动扩散和凝结控制方程.模型结果显示蒸汽放热量与实验测定值基本吻合,偏差在8%～15%之间.
Design and establish a set of water as the working fluid of the separation of heat pipe system test bench, the system condenser end using water-cooled tube heat exchanger on the basis of the experimental bench studied not vacuum, a large number of non-condensable gases exist The problem of condensation heat release in the separation heat pipe is analyzed. The mixed gas is condensed and heat-exchanged in the tube at different inlet steam temperature, circulating steam flow, cooling water inlet temperature and flow rate, and the influence of these parameters on the heat transfer process The physical model of water vapor condensation heat transfer with high partial pressure non-condensable gas contained in the casing is also studied and the corresponding mathematical model is established.In addition to the mass conservation, the momentum conservation, Energy conservation and interface control equations, the flow diffusion and condensation control equations are also added.The model results show that the heat release from steam is in good agreement with the experimental values, and the deviation is between 8% and 15%.