叶片安放角对无轴泵喷推进器性能的影响  

Influence of blade placement angle on performance of a shaftless pump-jet thruster

作　　者：狄猛 刘厚林[1] 谈明高[1] 马皓晨[2] 吴贤芳[3] 王凯[1] DI Meng;LIU Houlin;TAN Minggao;MA Haochen;WU Xianfang;WANG Kai(Research Center of Fluid Machinery and Engineering Technology,Jiangsu University,Zhenjiang 212013,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]江苏大学机械工程学院,江苏镇江212013 [3]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《流体机械》2022年第11期37-44,77,共9页Fluid Machinery

基　　金：国家自然科学基金项目(52179084、51779108)。

摘　　要：为揭示叶片安放角对无轴泵喷推进器运行特性的影响规律,采用计算流体动力学方法对无轴泵喷推进器在不同叶片安放角内部流动进行了数值模拟,分析了泵外特性、推力、内部流场分布以及压力脉动的变化规律。结果表明:设计工况下随着叶片安放角的增大,模型泵喷扬程和推力逐渐增大,效率逐渐降低,相较于叶片安放角0°,叶片安放角为+4°时扬程增大5.99%、推力增大2.08%、效率降低7.6%;叶片进口边压力明显下降,叶轮内流体流速逐渐减小,叶轮出口漩涡强度逐渐增强,漩涡面积减小;叶片安放角的变化对于泵喷内压力脉动的主频没有影响,但对主频处的幅值具有明显的影响,尤其是轮缘和流道中部压力脉动。研究结果对于低噪声无轴泵喷推进器的设计具有一定的参考价值。In order to reveal the influence of the blade placement angle on the performance of shaftless pump-jet thruster, CFD method was used to numerically simulate the internal flow at different placement angles of blade, and analyze the change rules of external characteristics, thrust, internal flow field distribution and pressure pulsation of the pump. The results show that under the design conditions, with the increase of the blade placement angle, the pump-jet head and thrust of the model pump gradually increase, and the efficiency gradually decreases;compared to 0°blade placement angle, the head increases by 5.99%, the thrust increases by 2.08%, and the efficiency decreases by 7.6% at +4°blade placement angle;the pressure at the inlet of the blade decreases significantly, the flow rate of the fluid in the impeller gradually decreases, and the vortex intensity at the outlet of the impeller gradually increases and the vortex area decreases;the change of the blade placement angle has no effect on the main frequency of the pressure pulsation in the pump jet, but has a significant effect on the amplitude of the pressure pulsation beyond main frequency, especially the pressure pulsation at the flange and the middle of the flow channel. The research results have certain reference value for the design of low-noise shaftless pump-jet thruster.

关 键 词：无轴泵喷推进器 数值模拟 叶片安放角 运行特性 压力脉动 

分 类 号：TH3[机械工程—机械制造及自动化] U664.34[交通运输工程—船舶及航道工程]