摘要
运用商用CFD软件FLUENT,对旋流自吸泵内部三维流场进行了数值模拟.计算采用标准k-ε模型,选择多重参考系模型将叶轮流场与蜗壳流场进行动静耦合,得到导壁附近的压力场及湍动能流场的分布规律.分析了导壁包角结构对流场的影响,建立了性能预测模型,通过对导壁包角分别为55,°65,°70°这3种结构尺寸模型的性能预测对比,探讨了导壁结构对于旋流自吸泵性能的影响.分析可知导壁结构对性能有一定影响,65°包角为最佳导壁结构.通过预测与试验结果的对比,二者结果较为一致.
The internal 3D flow field of rotational flow self-priming pump was simulated numerically by using commercial CFD software FLUENT. Standard k -ε model was adopted in calculation, and reference frame model was chosen to couple the static-dynamic flow field of impeller and volute. The flow fields of pressure and turbulent kinetic energy, near guide wall were obtained, and guide wall influence on flow field was analyzed. A performance prediction model was established. The influence of guide wall struc- ture on performance was discussed by comparing the prediction performances of three models with diffe- rent guide wall wrap angles of 55°,65°,70°. It is shown that the guide wall structure has some influence on the performance and wrap angles of 65° is the optimal structure from three guide wall structures. The predicted results are also in agreement with experimental results.
出处
《排灌机械》
EI
2009年第6期388-392,共5页
Drainage and Irrigation Machinery
基金
国家自然科学基金资助项目(50776040)
关键词
旋流自吸泵
数值模拟
导壁
k-ε模型
rotational flow self-priming pump
numerical simulation
guide wall
k-ε model
