不同叶片包角的斜流泵水力特性多维度研究  

Multidimensional study on hydraulic characteristics of mixed-flow pump with different wrap angles

作　　者：裴迎举 宋文武[1] 庞辉[1] 程伟[1] 候洁[1] 

机构地区：[1]西华大学能源与动力工程学院,四川成都610039

出　　处：《人民长江》2017年第16期73-77,共5页Yangtze River

基　　金：四川省科技厅项目(2016JY0187);四川省教育厅重大培育项目(14CZ0013);西华大学2016年研究生创新基金(ycjj2016098)

摘　　要：在保证斜流泵主要几何参数不变的前提下,对叶轮叶片包角为60°,65°,70°,75°和80°的斜流泵模型进行了数值模拟计算,分析了叶片包角变化对斜流泵水力特性及叶轮和空间导叶流场的影响。分析结果表明:叶片包角的改变对叶轮流道及空间导叶流道流场都会产生较大的影响;随着叶片包角(60°~70°)的增大,叶片流道扩散降低,叶片包角表面的脱流现象会得到较好的抑制,回流漩涡明显减少,叶片流道的流动较为顺畅;随着叶片包角的进一步增加,叶轮流道内的摩擦阻力也随之增大,并逐渐占据主要影响因子,说明斜流泵存在着一个最佳叶片包角值。研究结果可为斜流泵叶片包角的选择提供重要的参考。On premise of maintaining the main geometrical parameters of mixed - flow pump invariable , the numerical simulations of mixed - flow pump with wrap angles of 60° , 65° , 70° , 75° , 80° are conducted. By the simulation , the multidimensional impact of the wrap angle variation on pump hydraulic characteristics and flow fields of The results show that changes of wrap angles have a great impact on passage flow field of impellers and space diffusers , with increase of wrap angles in range of 60° - 70° , the diffusion of blades decreases , and flow separation on blade wrap angle surface is effectively prevented , and the phenomenon of reflux and vortex isnt obvious , so the flow in vane passages is more smooth. Withfurther increment of wrap angle , the frictional resistance inside the channel increases and graduallytor. Therefore , there is a best wrap angle for mixed - flow pump. The conclusion provides a reference for wrap angle selection ofmixed - flow pump.

关 键 词：叶片包角 水力特性 数值模拟 摩擦阻力 斜流泵 

分 类 号：TV136[水利工程—水力学及河流动力学]