前导叶叶片位置对灯泡贯流泵水力性能的影响
发布时间：2019-06-18 14:39
【摘要】：以南水北调东线淮安三站后置灯泡贯流泵装置为研究对象,采用ANSYS CFX数值模拟方法,并通过试验进行验证,计算并分析了不同的前导叶体叶片位置对进水流道水力性能以及泵装置能量特性的影响.结果表明:前导叶叶片由原设计位置向叶轮方向移动500 mm(此时与进水流道出水断面距离为0.064 5D)之后,设计工况下泵装置的效率较原来相比提高了1.28%;同时还使得进水流道的水力损失明显下降,降低了流道损失;改善了进水流道剖面的速度分布;不同工况下进水流道出水断面的轴向速度分布均匀度与速度加权平均角的值均有显著提高,转轮室的吸入流态得到了明显的改善.前导叶叶片位置对进水流道与泵装置的影响并不是简单的线性关系,前导叶体叶片位置与叶轮之间的距离存在着最优搭配.
[Abstract]:In this paper, an ANSYS CFX numerical simulation method is used to calculate and analyze the effect of different leading blade positions on the hydraulic performance of the water inlet channel and the energy characteristics of the pump device. The results show that, after the leading blade is moved by 500 mm from the original design position to the direction of the impeller (at this time, the distance between the water outlet section and the water inlet channel is 0.064 5D), the efficiency of the pump device is increased by 1.28% compared with that of the original design condition, and the hydraulic loss of the water inlet channel is reduced obviously. The flow path loss is reduced, the velocity distribution of the water inlet channel section is improved, and the axial velocity distribution uniformity and the speed weighted average angle value of the water inlet channel water outlet section under different working conditions are obviously improved, and the suction flow state of the rotating wheel chamber is obviously improved. The influence of the position of the leading leaf blade on the water inlet channel and the pump device is not a simple linear relationship, and the distance between the blade position of the leading blade and the impeller is optimally matched.
【作者单位】： 江苏大学国家水泵及系统工程技术研究中心;江苏省灌溉总渠管理处;
【基金】：国家自然科学基金资助项目(51109096) 江苏高校优势学科建设工程项目
【分类号】：TV136.2
本文编号：2501560
[Abstract]:In this paper, an ANSYS CFX numerical simulation method is used to calculate and analyze the effect of different leading blade positions on the hydraulic performance of the water inlet channel and the energy characteristics of the pump device. The results show that, after the leading blade is moved by 500 mm from the original design position to the direction of the impeller (at this time, the distance between the water outlet section and the water inlet channel is 0.064 5D), the efficiency of the pump device is increased by 1.28% compared with that of the original design condition, and the hydraulic loss of the water inlet channel is reduced obviously. The flow path loss is reduced, the velocity distribution of the water inlet channel section is improved, and the axial velocity distribution uniformity and the speed weighted average angle value of the water inlet channel water outlet section under different working conditions are obviously improved, and the suction flow state of the rotating wheel chamber is obviously improved. The influence of the position of the leading leaf blade on the water inlet channel and the pump device is not a simple linear relationship, and the distance between the blade position of the leading blade and the impeller is optimally matched.
【作者单位】： 江苏大学国家水泵及系统工程技术研究中心;江苏省灌溉总渠管理处;
【基金】：国家自然科学基金资助项目(51109096) 江苏高校优势学科建设工程项目
【分类号】：TV136.2
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