非线性环量分布对泵诱导轮性能的影响

The Influence of the Nonlinear Circulation Distribution on Pump Inducer Hydraulic Characteristics

在诱导轮设计过程中引入环量分布规律来控制叶片不同叶高处的叶片安放角,根据轴流泵相关设计经验,选取非线性环量分布,在原型泵的基础上,设计了一新型诱导轮,并通过数值计算的方法,研究非线性环量分布对诱导轮性能的影响。水力设计计算结果表明:出口环量分布规律可作为诱导轮设计的控制参数,它直接影响诱导轮包角的大小。数值计算结果表明:非线性环量分布诱导轮对泵空化性能有明显提高,对泵外特性影响有限。

In the process of inducer design,this paper presents circulation distributions to regulate the blade angle at different blade heights.According to the design experience of axial pumps,a new type of inducer with nonlinear ring distribution is designed on the basis of prototype pump. The influence of nonlinear ring distribution on the performance of inducers is studied by numerical calculation. Hydraulic design calculation results show that the circulation distribution can be used as the control parameter for inducer design and they directly affects the wrap angle of the inducer. The numerical simulation results are as follows. Inducer with nonlinear circulation distribution has a significant effect on the cavitation performance of the pump,but it has a limited influence on the external characteristics of the pump.