排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (2): 167-170    DOI: 10.3969/j.issn.1674-8530.2012.02.009
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斜流泵叶轮和导叶叶片数对压力脉动的影响
 张德胜, 施卫东, 王川, 王国涛, 邹萍萍

(江苏大学流体机械工程技术研究中心, 江苏 镇江 212013)
Influence of impeller and guide vane blade number on pressure fluctuation in mixedflow pump
 ZHANG  De-Sheng, SHI  Wei-Dong, WANG  Chuan, WANG  Guo-Tao, ZOU  Ping-Ping

(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
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摘要 为了研究斜流泵叶轮和导叶由于动静相干作用(RSI)而引起的压力脉动规律,基于标准k-ε湍流模型、SIMPLEC算法和滑移网格技术,根据叶轮和导叶叶片数及其叶片厚度设计了多种计算方案,并对不同方案的斜流泵模型进行了非定常数值模拟.采用叶轮进口、叶轮出口和导叶内部布点监测压力的方法获得了压力脉动曲线,并基于时域图分析了叶轮叶片数、导叶叶片数及其厚度对斜流泵内部压力脉动特性的影响.数值计算结果表明:斜流泵叶轮叶片动静干涉对整个流场的压力脉动影响较大,叶轮叶片数越少,叶轮进、出口压力脉动幅值越大;在设计工况下,导叶内部的压力脉动波形主要受叶轮叶片数影响,而导叶厚度对导叶内部压力脉动影响较小.研究结论将为斜流泵的设计和稳定运行提供参考.
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张德胜
施卫东
王川
王国涛
邹萍萍
关键词斜流泵   叶片数   压力脉动   非定常流动   数值模拟     
Abstract: To investigate into the pressure fluctuation feature caused from the rotorstator interaction between the impeller and the diffuser in a mixedflow pump, the unsteady flow field in the pump with different numbers of blades in the impeller and the diffuser were numerically simulated based on the standard k-ε turbulence   model, SIMPLEC algorithm and sliding mesh model. The pressure fluctuation data were acquired by monitoring fluid pressure at the points located at the impeller and diffuser. The influence of number of blades and blade thickness on the pressure fluctuation was discussed in timedomain. The results show that the number of impeller blades is the main factor causing pressure fluctuation in the whole flow field. The pressure fluctuation amplitudes in the inlet and outlet to the impeller is consistently increased when the number of impeller blades is reduced; while the pressure fluctuation at the impeller outlet and in the diffuser is less affected by the number of guide vanes. Those conclusions will provide a reference for hydraulic design of mixedflow pumps and their stable operations.
Key wordsmixedflow pump   blade number   pressure fluctuation   unsteady flow   numerical simulation   
收稿日期: 2011-09-22; 出版日期: 2012-03-30
基金资助:

国家自然科学基金资助项目(51109093,51079063); 江苏省自然科学基金资助项目(BY2010131); 国家博士后科研基金资助项目(2011M500117)

通讯作者: 张德胜(1982—),男,江苏如皋人,助理研究员,博士(zds@ujs.edu.cn),主要从事轴流泵理论及其流动研究.   
作者简介: 施卫东(1964—),男,江苏如东人,研究员,博士生导师(wdshi@ujs.edu.cn),主要从事流体机械及工程的研究.
引用本文:   
张德胜,施卫东,王川等. 斜流泵叶轮和导叶叶片数对压力脉动的影响[J]. 排灌机械工程学报, 2012, 30(2): 167-170.
ZHANG De-Sheng,SHI Wei-Dong,WANG Chuan et al. Influence of impeller and guide vane blade number on pressure fluctuation in mixedflow pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 167-170.
 
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