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排灌机械工程学报
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排灌机械工程学报  0, Vol. Issue (): 24-    DOI:
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  导叶参数对混流泵水阻系数及效率的影响
杨从新  杜媛英  黎义斌
(兰州理工大学  能源与动力工程学院,兰州 730050)
The Effects for Parameter of Mixed-flow Pump Stator Blades on Water Resistance Coefficient and Efficiency Performance
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摘要 以某混流泵为研究对象,基于FLUENT软件,建立相对坐标系下的时均连续方程及N-S方程,并采用RNG 湍流模型、非结构四面体网格和SIMPLEC算法对该混流泵内部三维流动进行数值模拟,在分析网格无关性的基础上,给出了叶轮叶片和导叶体叶片的静压及绝对速度分布规律;并对在不同的导叶叶片数下和不同的导叶进口角下分别模拟了其在静态时的水阻系数和在动态时的性能参数,发现当其他参数不变,叶轮叶片数为4,当导叶叶片数为3时该混流泵水阻系数最低,当导叶叶片数为9时混流泵扬程和效率最高;当其他参数不变,导叶进口角分别为+2.5°、0°、-2.5°时,在进口冲角为0°时该混流泵的水阻系数最低,扬程和效率最高,但总体变化不明显。结果表明:在特殊环境下、保证设计所要求的效率的情况下,导叶叶片数应尽量少;在设计混流泵的空间导叶时,导叶为获得较低的水阻系数,入口角在5°左右的范围内改变时,混流泵的性能无明显变化。
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杨从新
杜媛英
黎义斌
关键词混流泵    水阻系数    导叶叶片数    导叶进口角    数值模拟     
Abstract: Using a kind of mixed-flow pump as the object of the study,the time-averaged continuity equation with relative coordinates and the N-S equation are established on the basis of FLUENT software,and the numerical simulation was made by using standard k-ε equation with turbulence model,unstructured tetrahedral network and SIMPLE algorithm .On the basis of the irrelevance of grid number, the static pressure and absolute velocity distributions of impeller blades and stator blades were calculated.And the water resistance coefficient simulation when it is static and the performance parameter simulation when it is rotary were made under different number of stator blades and different inlet angle of stator blade. When the number of impeller blades is 4 and other parameters remain unchanged ,the water resistance coefficient is lowest when the stator blades number is 3, and the head and the efficiency are highest when the stator blades number is 9.When other parameters do not change, the inlet angle of stator blade are +2.5°、0°、-2.5°, the water resistance coefficient was lowest 、 the head and the efficiency are highest when the inlet angle of stator blade is 0°,and the water resistance coefficient,the head and the efficiency don't change significantly.The results show that under special environment the number of stator blades should be taken less to obtain lower water resistance coefficient when the requirements of the design efficiency were insured,and when designing space diffuser to obtain lower water resistance coefficient ,the mixed- flow pump performance have no significant change when the inlet angle of stator blade changed in the range of about 5°.
Key wordsMixed-flow Pump   Water resistance coefficient   The number of stator blade    The inlet angle of stator blade    Numerical simulation;   
引用本文:   
杨从新,杜媛英,黎义斌.   导叶参数对混流泵水阻系数及效率的影响[J]. 排灌机械工程学报, 0, (): 24-.
YANG Cong-Xin,DU Yuan-Ying,LI Yi-Bin. The Effects for Parameter of Mixed-flow Pump Stator Blades on Water Resistance Coefficient and Efficiency Performance[J]. Journal of Drainage and Irrigation Machinery Engin, 0, (): 24-.
 
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