兰州理工大学学报

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (1): 61-68.

• 机械工程与动力工程 • 上一篇    下一篇

叶片包角对恒扬程泵性能的影响

程效锐1,2, 田龙*1, 李天鹏3, 杨登峰4   

  1. 1.兰州理工大学 能源与动力工程学院, 甘肃 兰州 730050;
    2.兰州理工大学 甘肃省流体机械及系统重点实验室, 甘肃 兰州 730050;
    3.武汉航达航空科技发展有限公司, 湖北 武汉 430010;
    4.上海大学 力学与工程科学学院, 上海 200072
  • 收稿日期:2021-07-13 出版日期:2023-02-28 发布日期:2023-03-21
  • 通讯作者: 田 龙(1993-),男,甘肃定西人,硕士. Email:2069436641@qq.com
  • 基金资助:
    国家自然科学基金(51469013)

Influence of blade wrap angle on performance of constant head pump

CHENG Xiao-rui1,2, TIAN Long1, LI Tian-peng3, YANG Deng-feng4   

  1. 1. School of Energy and Power Engineering, LanzhouUniv. of Tech., Lanzhou 730050, China;
    2. Key Laboratory of Fluid Machinery and System of Gansu Province, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    3. Wuhan Hangda Aviation Technology Development Co. Ltd., Wuhan 430010, China;
    4. College of Mechanics and Engineering Science, Shanghai Univ., Shanghai 200072, China
  • Received:2021-07-13 Online:2023-02-28 Published:2023-03-21

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摘要： 为了研究叶片包角对恒扬程泵性能的影响规律,设计了6种不同包角叶片的叶轮,基于雷诺时均N-S方程、RNG k-ε湍流模型进行了定常数值计算,并对计算结果进行了实验验证.结果表明,在切断流量之前泵的扬程随包角的增大而减小,0°包角时泵的扬程最大,15°、30°、45°包角时泵的扬程基本相等,60°包角时泵的扬程最小,75°包角时泵的扬程随流量的增大线性减小.叶片包角对泵的效率具有较大影响,泵的效率在任一包角随着流量的增大先增大后减小.在切断流量附近,效率达到最大值;切断流量之前,效率随包角的增大而增大;切断流量之后,包角越大,效率随流量增大而减小得越快.

关键词: 恒扬程, 包角, 压水室, 切断流量, 数值计算

Abstract: In order to study the influence of blade wrap angle on the performance of constant head pump, six impeller schemes with different blade wrap angle had been designed. Based on the Reynolds time-average N-S equation and the RNG k-ε turbulence model, the steady numerical calculation had been carried out, following the calculated results verified by experiments. The results show that before the cut-off flow, pump head decreases with the increase of the wrap angle. When the wrap angle of pump is 0 degree, the pump head is the largest. Under the schemes of 15 degrees, 30 degrees, and 45 degrees, the head of the pump is almost equal. When the wrap angle of pump is 60 degrees, pump has the smallest head, and the pump head decreases linearly with the increase of flow when the wrap angle is 75 degrees. The blade wrap angle has a significant influence on the efficiency of the pump. The pump efficiency in any scheme first increases and then decreases with the increase of flow, while the efficiency reaches its maximum value near the cut-off flow. Under the condition before the cut-off flow, the pump efficiency increases with the increase of the wrap angle, while after the cut-off flow, the larger the wrap angle is, the faster the efficiency decreases with the increase of the flow.

Key words: constant head, wrap angle, pumping chamber, cut-off flow, numerical calculation

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