斜轴变桨轴流泵空化特性试验

Experiments on cavitation characteristics of an inclined shaft variable propeller axial flow pump

为研究单机流量为50 m^(3)/s的新型斜轴轴流泵的空化特性,基于轴流泵试验平台,针对斜轴轴流泵开展不同叶片角度条件下的能量特性及内部流动特性分析,总结了该类泵空化现象的发生规律,确定了合理的设计参数与运行参数。结果表明:叶片角度及扬程与水泵空化性能密切相关,在高扬程或超低扬程运行时,水泵空化性能较差,易产生空化;可通过变桨技术,减小水泵叶片角度,从而改善空化性能,获取更优的运行稳定性。

To investigate the cavitation characteristics of a novel inclined axial flow pump with a single flow rate of 50 m^(3)/s,based on an axial flow pump test platform,the energy characteristics and internal flow characteristics of the inclined axial flow pump under different blade angles were analyzed.The occurrence law of cavitation phenomenon for this kind of pump was summarized and reasonable design parameters and operation parameters were determined.The results show that the blade angle and head are closely related to the cavitation performance of the pump,and the cavitation performance of the pump is poor when running at high head or ultra-low head,which is easy to produce cavitation.The angle of pump blades can be reduced by variable propeller technology,so as to improve the cavitation performance and obtain better operation stability.