单相及两相水润滑介质的物性参数获取

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核主泵轴承水介质在高温下受热出现两相现象，气液两相对核主泵轴承性能有一定的影响，有必要对单相及两相下水介质物性参数进行研究。研究核主泵轴承工况的水介质物性情况，获取水介质在单相及两相的物性参数。研究结果表明：单相（液相或气相）水介质在一定的压力和温度下，可建立单相水介质密度和黏度随压力和温度的关系或直接查表获得物性参数（密度、黏度）；两相水介质物性参数的确定可以采用两相均质混合模型方法进行计算，从液态变成全气态的水介质黏度和密度连续下降至全液态时的1／6。 Water medium of sliding bearing in reactor coolant pump appears two-phase flow phenomena under high temperature, gas liquid two phase has some impact on sliding bearing in reactor coolant pump, it＇ s necessary to implement research on the physical parameters of single-phase and two-phase water medium. The physical parameters of water medium of sliding bearing in reactor coolant pump＇ s working condition were studied and the physical parameters of water medium under single-phase flow and two-phase flow were acquired. The results show that the relationship between single-phase water medium＇ s density, viscosity and pressure, temperature can be constructed when single-phase（liquid phase or gas phase） water medium under certain pressure and temperature or the physical parameters can be acquired directly by lookup table. For two-phase water medium, whose physical parameter can be calculated by mixture model for two-phase flow approach. Calculation results show that water medium turns from liquid to gas totally, viscosity and density continuously decline to 1/6 of liquid state.