首页|混流泵导叶径向高度对其水力性能的影响

混流泵导叶径向高度对其水力性能的影响

扫码查看
为获得混流泵导叶径向高度对其水力性能的影响规律,沿某混流模型泵导叶出口径向对其进行不同程度截短,设计出导叶径向高度不同的几种改型泵.针对改型泵以及导叶径向高度未被截短的原型泵,基于NUMECA软件平台,对混流泵内部流动进行了全工况的数值模拟,获得了各泵的变工况水力性能.通过分析泵内部流场和静压分布,揭示了导叶径向高度对该型混流泵过流部件内部流动的影响规律.研究表明:相对原型泵和其他改型泵,导叶径向高度截短至原导叶高度的90%时,导叶与压水室蜗壳的匹配性提升效果最佳;在设计流量工况下,该改型泵导叶与蜗壳内总的流动损失比原型泵减少2.85个百分点;在1.2倍设计流量工况下,该改型泵的扬程比原型泵高11.15 m,效率提高3.46%;在全工况范围内,原型泵的最低效率约为75%,最高效率约为89%,而该改型泵的最低效率约为81.6%,最高效率约为89.4%,拥有更宽的高效工作区间和更优的水力性能.
Effect of Radial Height of Guide Vanes on Hydraulic Performance of Mixed-flow Pump
To investigate the effect of the guide vane radial height on the hydraulic performance of a mixed-flow pump,the guide vane was truncated to a certain extent along the radial direction at the outlet,and several modified pumps with different radial heights of the guide vane were designed.For the modi-fied pump and the prototype pump without truncation,the internal flow in the pumps was numerically simulated based on NUMECA software platform under full operating conditions,and the hydraulic per-formance of the pumps under the design and off-design conditions was obtained.Through analyzing the internal flow field and static pressure distribution,the impact of the guide vane radial height on the flow characteristics in the pumps was revealed.The results show that compared to the prototype pump and oth-er modified pumps,when the radial height of the guide vane is truncated to 90%of its original height,the matching between the guide vane and the pressure chamber volute is effectively improved.The total flow loss between the guide vane and the volute of the modified pump is reduced by 2.85 percentage points compared to the prototype pump under the design flow rate condition.At an operating condition of 1.2 times the design flow rate,the head of the modified pump is 11.15 meters higher than that of the prototype,with an efficiency increasing of 3.46%.Over the entire operating range,while the prototype pump has a minimum efficiency of about 75%and a maximum efficiency around 89%,the modified pump demonstrates a wider high-efficiency working range with a minimum efficiency of approximately 81.6%and a maximum efficiency of about 89.4%.Thus,the modified pump exhibits superior hydraulic performance with a broader efficient operation envelope.

mixed-flow pumphydraulic performanceguide vane radial heightnumerical simulationflow loss

鞠东兵、李伟楠、王超、谢蓉

展开 >

海装沈阳局,辽宁沈阳 110031

大连理工大学海洋能源利用与节能教育部重点实验室,辽宁大连 116024

中国船舶集团有限公司第七○三研究所,黑龙江哈尔滨 150078

混流泵 水力性能 导叶径向高度 数值模拟 流动损失

2024

热能动力工程
中国 哈尔滨 第七0三研究所

热能动力工程

CSTPCD北大核心
影响因子:0.345
ISSN:1001-2060
年,卷(期):2024.39(6)
  • 8