赵浩儒,杨帆,吴俊欣,陈世杰,武蒙
ZHAO Hao-ru,YANG Fan,WU JUN-xin,CHEN Shi-jie,WU Meng

• 1:扬州大学
• 2:江苏省水利勘测设计研究院有限公司

摘要(Abstract)：

为了分析不同流量时立式轴流泵装置进出水过流部件压力脉动特性,在进水流道出口段、出水流道渐扩段的壁面共设置7个压力脉动监测点进行实时测量,并采用快速傅里叶变换对时域数据进行处理。结果表明:进水流道出口段监测点P1,P2时域图为正弦波形,一个周期内波峰波谷数与叶片数相同,此时的脉动峰峰值远大于监测点P4,P6;出水流道渐扩段监测点P4,P6峰峰值从1.2Qbep到0.3Qbep先减小后增大,最优流量时脉动峰峰值最小。基于频谱分析,在不同流量时进水流道出口段各测点压力脉动的主频均为转频及其谐频,出水流道渐扩段监测点脉动幅值随流量的增大先减小后增大,且在最优工况时脉动幅值为最小值。转频对出水流道渐扩段处各监测点脉动频率的影响未呈现规律性。
In order to analyze characteristics of axial flow pump pressure fluctuation under different flow rates,seven pressure monitoring points were arranged on the pump section casing of the impeller inlet and outlet passage.The results show that the time domain diagram of pressure fluctuation of monitoring points at the impeller inlet was the normal sine shape and and the peak-peak value is much larger than the monitoring points P4 and P6.Time domains of pressure fluctuation at the impeller had four peaks and four valleys which were consistent with the number of the impeller blade.Based on the frequency domain diagram analysis,he main frequency of pressure fluctuation at the impeller inlet were all blade passing frequency and the harmonic frequency was its multiple frequency of the blade passing frequency.The fluctuation amplitude of the monitoring points of the outlet passage decreased first and then increased with the increase of the flow rate,and the amplitude of the pressure fluctuation is the smallest under the optimal operational condition.The regularity of the pressure fluctuation of the monitoring points P4,P6 is not found.

关键词(KeyWords)： 轴流泵;泵装置;压力脉动;模型试验
axial flow pump;pumping system;pressure fluctuation;model test

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51609210);; 江苏省自然科学基金资助项目(BK20150457);; 流体及动力机械教育部重点实验室开放课题资助项目(szjj2016-078);; 江苏省研究生科技创新计划项目(SJLX16_0596)

作者(Author): 赵浩儒,杨帆,吴俊欣,陈世杰,武蒙
ZHAO Hao-ru,YANG Fan,WU JUN-xin,CHEN Shi-jie,WU Meng

参考文献(References)：

• [1]刘超.水泵及水泵站[M].北京:中国水利水电出版社,2009.
• [2]王福军,张玲,张志民.轴流泵不稳定流场的压力脉动特性研究[J].水利学报,2007,38(8):1003-1007.
• [3]Desheng Zhang,Dazhi Pan,Yan Xu,et al.Numerical investigation of blade dynamic characteristics in an axial flow pump[J].Thermal Science,2013,17(5):1511-1514.
• [4]杨帆,刘超,汤方平,等.S形下卧式轴伸贯流泵装置叶片区压力脉动特性研究[J].流体机械,2015,43(1):16-22.
• [5]汤方平,张丽萍,付建国,等.轴流泵内部压力脉动数值预测及分析[J].排灌机械工程学报,2013,31(10):835-838.
• [6]Khalifa A E,Al-Qutub A M,Ben-Mansour R.Study of pressure fluctuations and induced vibration at blade-passing frequencies of a double volute pump[J].Arabian Journal for Science and Engineering,2011,36(7):1333-1345.
• [7]姚捷,施卫东,吴苏青,等.轴流泵压力脉动数值计算与试验[J].农业机械学报,2013,44(1):120-124.
• [8]姚志峰,王福军,肖若富,等.双吸离心泵吸水室和压水室压力脉动特性试验研究[J].水利学报,2012,43(4):473-479.
• [9]Wang K,Liu H,Zhou X,et al.Experimental research on pressure fluctuation and vibration in a mixed flow pump[J].Journal of Mechanical Science and Technology,2016,30(1):179-184.
• [10]杨帆,刘超,汤方平,等.灌排双向立式泵装置内部水流压力脉动特性[J].排灌机械工程学报,2011,29(4):316-321.
• [11]施卫东,张光建,张德胜,等.入口非均匀流对轴流泵性能和压力脉动的影响[J].排灌机械工程学报,2014,32(4):277-282.
• [12]石磊,张德胜,陈健.基于PANS模型的轴流泵叶顶空化特性[J].排灌机械工程学报,2016,34(7):584-590.
• [13]张丽萍.非均匀来流条件下轴流泵内部压力脉动数值模拟研究[D].扬州:扬州大学,2013.