李伟,季磊磊,施卫东,周岭,平元峰.不同流量工况下混流泵压力脉动试验[J].农业机械学报,2016,47(12):70-76.
Li Wei,Ji Leilei,Shi Weidong,Zhou Ling,Ping Yuanfeng.Experiment on Pressure Fluctuation in Mixed-flow Pump under Different Flow Rate Conditions[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(12):70-76.
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不同流量工况下混流泵压力脉动试验   [下载全文]
Experiment on Pressure Fluctuation in Mixed-flow Pump under Different Flow Rate Conditions   [Download Pdf][in English]
投稿时间:2016-09-21  
DOI:10.6041/j.issn.1000-1298.2016.12.010
中文关键词:  混流泵  压力脉动  流量工况  试验
基金项目:国家自然科学基金项目(51409127、51679111、51579118)、“十二五”国家科技支撑计划项目(2015BAB07B06)、江苏省重点研发计划项目(BE2015119、BE2015001—4)、江苏省六大人才高峰项目(HYZB—002)、江苏省自然科学基金项目(BK20161472)、江苏高校优势学科建设工程项目(PAPD)和江苏大学高级专业人才科研启动基金项目(13JDG105)
作者单位
李伟 江苏大学 
季磊磊 江苏大学 
施卫东 江苏大学 
周岭 江苏大学 
平元峰 江苏大学 
中文摘要:为了研究混流泵叶轮和导叶非定常时序干涉引起的压力脉动特性,通过试验对混流泵泵体关键测点进行了压力脉动测量,分析了不同流量工况下叶轮进口、叶轮中部、叶轮出口、导叶进口、导叶出口以及装置出口等位置压力脉动的时域和频域响应。研究结果表明:叶轮旋转周期较大程度影响了叶轮进口、叶轮中部监测点的压力脉动,脉动曲线出现了与叶轮叶片数相一致的4个波峰和4个波谷,压力脉动主频为叶轮叶片通过频率;叶轮和导叶的动静干涉作用使得叶轮出口和导叶进口监测点压力脉动在小流量工况下分别出现7~12个波峰和波谷,压力脉动频谱范围变大,分频成分增多,主频随着流量减小向高频方向偏移,动静干涉诱导的流体激振以及噪声等高频成分出现并逐渐增多。叶轮中部监测点的压力脉动幅值最大且对流量变化最敏感,远离叶轮区各监测点的压力脉动受流量变化的影响较小。
Li Wei  Ji Leilei  Shi Weidong  Zhou Ling  Ping Yuanfeng
Jiangsu University,Jiangsu University,Jiangsu University,Jiangsu University and Jiangsu University
Key Words:mixed-flow pump  pressure fluctuation  flow rate conditions  experiment
Abstract:In order to study the pressure fluctuation characteristics in the mixed flow pump caused by the effect of impeller and guide vane’s unsteady periodical interference, the pressure fluctuation in key monitoring points was measured on the mixed-flow pump body. The time domain and frequency domain responses of the pressure fluctuation under different flow rate conditions on the impeller inlet, middle part of impeller, impeller outlet, guide vane inlet, guide vane outlet and device exit were analyzed. The results showed that the impeller rotational cycle greatly influenced the pressure fluctuation at the positions of the impeller inlet and the blade rim central point of the impeller. The four peaks and four valleys were appeared in the fluctuation curves which were consistent with the number of impeller blades. Meanwhile, the main pressure fluctuation frequency was consistent with the impeller blade passing frequency. The pressure fluctuations appeared 7~12 peaks and valleys respectively in impeller outlet monitoring points and guide vane inlet monitoring points under small flow rate condition, which was caused by the rotor-stator interaction between impeller and guide vane. Besides, due to the rotor-stator interaction, the pressure fluctuation spectrum range became larger and frequency component was increased. The main frequency was shifted to high frequency with the decrease of flow rate. The fluid vibration induced by dynamic and static interference and the noise of high frequency composition was increased gradually. The pressure fluctuation amplitude of the monitoring points in the center of the impeller was the largest and the most sensitive to the change of flow rate, the pressure fluctuation of the monitoring points away from the impeller area was less affected by the change of flow rate. The research results had significant reference value for revealing the unsteady flow characteristics of mixed-flow pump.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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