摘要
采用雷诺时均N-S方程和标准k-ε湍流模型,应用三维非结构四面体网格建模,选用旋转流体机械模型中的多重参考坐标系模型(MRF),对设计工况下两种不同导叶形式核主泵模型泵的三维湍流流场进行了数值模拟,模拟结果较好地揭示了内部流场的特征.对内部流场的静压分布特征进行了研究,发现静压从叶轮进口到球壳呈持续增加的趋势,且导叶流道的静压分布具有非对称性的特征,比较分析了两种模型泵的流线图,得到了球壳与出口管相交位置处的回流特征.研究结果可用来了解核主泵模型泵的内部流场特征,并为其水力优化设计提供有益参考.
Reynolds time-averaged N - S equations, standard k - ε turbulent model, three - dimensional non-structural tetrahedral mesh, and multiple reference frame model were used to calculate the three-dimensional turbulent flow of nuclear model pumps with two different diffusers under the design condition. The static pressure distribution in interior flow field was obtained. Continual increased trend of static pressure from impeller inlet to spherical shell and unsymmetrical character in the diffuser were discovered. Streamlines of the two model pumps were compared and analyzed. The results can be used to study the interior flow field characteristics of the nuclear model pump, and will provide some useful references for hydraulic optimized design.
出处
《排灌机械》
2008年第5期38-41,共4页
Drainage and Irrigation Machinery
基金
国家自然科学基金资助项目(50776040)
