摘要
针对用传统的速度系数法设计蜗壳,其设计质量受统计资料和人为因素影响很大的问题.根据叶轮与蜗壳的匹配关系,通过数学推导给出了低比转速离心泵蜗壳第八断面面积的计算方法.采用标准k-ε湍流模型和SIMPLE算法,计算4种大小不同的蜗壳匹配相同叶轮时的三维不可压缩湍流流动,得到泵的外特性.通过计算和试验数据对比,得出低比转速离心泵蜗壳第八断面面积的确定方法.用该方法设计蜗壳,泵在设计点能达到最佳效率.
The performance of volute designed by the method of velocity coefficient is affected by the statistics and designer＇s experience. The calculation method of the volute eighth section area in the low specific speed pump is deduced, which is based on the correlation between the impeller and the volute. Four 3 - D incompressible flow conditions, which consist of the same impeller and four different volutes respectively, are simulated by using the standard k-ε turbulent model and SIMPLE algorithm, and their performance characteristics are also obtained. By verification of corresponding experiment data, a reasonable method in determining the eighth section area is put forward. The pump with this kind of volute can have the best efficiency at the rated flow rate.
出处
《排灌机械》
2008年第1期29-32,共4页
Drainage and Irrigation Machinery
基金
国家改革与发展委员会基金资助项目(机械2005-336)
关键词
离心泵
蜗壳
第八断面
喉部面积
低比转速
centrifugal pump
volute
eighth section
throat area
low specific speed
