可调导叶式轴流泵马鞍区水力特性试验研究  

Experimental study on hydraulic performance of saddle zone in axial flow pump with adjustable guide vane

作　　者：钱忠东[1] 王凡[1] 王志远[1] 周皖[1] 

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,湖北武汉430072

出　　处：《排灌机械工程学报》2013年第6期461-465,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金："十二五"国家科技支撑计划项目(2012BAD08B03);国家自然科学基金资助项目(51079106)

摘　　要：为了分析不同导叶安放角对轴流泵在马鞍区工况运行时的影响,探究导叶角度的优化规律,在水泵模型试验台上,对一种新型可调导叶式轴流泵的外特性进行测试,得到不同导叶安放角下H-Q、η-Q、P-Q曲线,分析了导叶安放角对轴流泵马鞍区水力特性的影响.试验结果表明:相同流量工况下轴流泵的扬程和效率随着导叶安放角由0°向-5°调节而增大,调节导叶安放角,能够有效抑制叶片背面脱流旋涡的扩散,显著改善轴流泵出口的流态,提高动能回收的比例;在马鞍区工况下,扬程最大提升0.15m,为设计扬程的4.69%,效率最大提升1.93%;马鞍区起始点流量向小流量偏移了0.00494m3/s,马鞍区范围减小了6.64%,拓宽了轴流泵稳定运行的区域;导叶安放角在-5°～0°的调整过程中,轴流泵的轴功率没有明显变化;在本次试验条件下,导叶安放角为-5°时马鞍区水力特性改善效果最明显,但仍有进一步提升的空间.In order to analyze the effects of adjustable guide vane（AGV） on axial pumps working in saddle zone,in the hope of optimizing adjusting laws,performance test of a new axial-flow pump with AGV was carried out on the pump test bed.Q-H,Q-η and Q-P curves at different guide vane angles were obtained.The effects of AGV on hydraulic performance of the model pump in saddle zone were analyzed.The results show that,at the same flow rate,head and efficiency of axial flow pump increase as guide vane angle is adjusted from 0° to-5°.With AGV,the separation vortex in the flow channel is suppressed effectively;flow regime at pump outlet is optimized obviously;kinetic energy recovery rate is improved.Head and efficiency of the pump are improved by 0.15 m（0.046 9Hd） and 1.93% respectively.The critical flow discharge is decreased by 0.004 94 m3/s and the range of saddle-shaped zone is narrowed by 6.64%,broadening the range of stable working zone.At guide vane angle of-5°-0°,the shaft power changes little.In this experiment,the best values of hydraulic performance obtained are at-5° guide vane angle,but they can be further improved.

关 键 词：轴流泵 可调导叶 马鞍区 模型试验 优化 

分 类 号：S277.9[农业科学—农业水土工程] TH312[农业科学—农业工程]