【摘要】 燃料组件定位格架的两相流动压降计算是反应堆热工水力计算的一个重要内容.本文从两相流动的机理分析入手,根据动量平衡关系推导出了定位格架的两相流压降计算关系式.并用实验数据进行了验证,实验数据与计算公式之间的偏差不超过±30%.更多还原

【Abstract】 The spacer grid is an important element used in the fuel assembly in the core of a nuclear reactor.The prediction of form loss across thespacer grid under the condition of two-phase flow is an important sub-ject in the thermal hydraulic design and analysis of a nuclear reactor.Ba-sed on the consideration of the two-phase flow mechanisms in the spac-er grid and the momentum balances a new correlation used to predictthe pressure drop across the spacer grid in two-phase flow is presented.The validity of the correlation is judged by the available experimentaldata,the correlation predicts the experimental data within ±30%.更多还原