排灌机械工程学报
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排灌机械工程学报  2017, Vol. 35 Issue (2): 113-118    DOI: 10.3969/j.issn.1674-8530.15.0221
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非等距叶片分布对旋涡自吸泵压力脉动的影响
刘志超, 孔繁余, 王洋, 谢山峰, 赵立峰
江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013
Effect of unequal spacing blade distribution on pressure fluctuation of self-priming vortex pump
LIU Zhichao, KONG Fanyu, WANG Yang, XIE Shanfeng, ZHAO Lifeng
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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摘要 为了减小旋涡自吸泵压力脉动幅值及泵运行时的噪声,采用非等距叶片的分布方式,设计了3种叶片分布叶轮,分别对旋涡自吸泵进行稳态性能和压力脉动分析.利用RNG k-ε模型求解旋涡自吸泵内部非定常流动和性能,并获得旋涡自吸泵内部径向和轴向间隙处压力脉动数据.数值结果表明:非等距叶片分布会对旋涡自吸泵的性能产生一定的影响.当调制角较小时,其对旋涡自吸泵的性能影响较小;总体上,调制角对自吸泵效率影响不大.与等距叶片相比,非等距叶片的压力分布较小.另外,非等距叶片分布能够有效地减小旋涡自吸泵的压力脉动幅值和改变脉动的主频,同时调制角的变化会影响压力脉动特性,当调制角为5°时,主频幅值下降幅度最大.控制调制角在合适范围内可以获得更好的压力脉动特性.
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刘志超
孔繁余
王洋
谢山峰
赵立峰
关键词压力脉动   非等距叶片   旋涡自吸泵   数值分析     
Abstract: In order to reduce pressure pulsation amplitude and the noise of vortex pump when the pump is running,three kinds of impeller blades are designed based on the unequal spacing blade distribution, studying the steady-state performance and pressure fluctuation of self-priming vortex pump. Internal radial and axial gap pressure data of self-priming vortex pump is obtained by computing vortex self-priming unsteady flow and the performance of the pump with the RNG k-ε model. The numerical results show that the unequal spacing blade distribution will have a certain effect on the performance of self-priming vortex pump. When the modulation angle is small, that has little effect on the efficiency of the self suction pump. Compared with the equal spacing blades, the pressure distribution of the unequal spacing blades is small. In addition, the unequal spacing blade can effectively reduce pressure pulsation amplitude of the self-priming vortex pump and change pulsating frequency distribution, and changes of modulation angle will affect the pressure fluctuation amplitude.When the modulation angle is 5°,pressure fluctuation amplitude of main frequency declines a lot. The better pressure fluctuation characteristics can be obtained by controlling the modulation angle in the proper range.
Key wordspressure fluctuation   unequal spacing blade   self-priming vortex pump   numerical analysis   
收稿日期: 2015-10-12;
基金资助:“十二五”国家科技支撑计划项目(2011BAF14B01);江苏高校优势学科建设工程项目
通讯作者: 孔繁余(1956—),男,江苏扬州人,研究员,博士生导师(kongfy291s@sohu.com),主要从事石化、军工等特种泵的设计、试验研究.   
作者简介: 刘志超(1988—),男,河南卢氏人,硕士生(2008bigsea@163.com),主要从事流体机械及工程研究.
引用本文:   
刘志超,孔繁余,王洋等. 非等距叶片分布对旋涡自吸泵压力脉动的影响[J]. 排灌机械工程学报, 2017, 35(2): 113-118.
LIU Zhi-Chao,KONG Fan-Yu,WANG Yang et al. Effect of unequal spacing blade distribution on pressure fluctuation of self-priming vortex pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(2): 113-118.
 
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