施卫东,季磊磊,李伟,邵佩佩,李维强,蒋小平.不同流量工况下斜流泵内部流场PIV试验[J].农业机械学报,2016,47(6):27-33.
Shi Weidong,Ji Leilei,Li Wei,Shao Peipei,Li Weiqiang,Jiang Xiaoping.PIV Experiment on Internal Flow Field of Mixed-flow Pump under Different Flow Conditions[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(6):27-33.
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不同流量工况下斜流泵内部流场PIV试验   [下载全文]
PIV Experiment on Internal Flow Field of Mixed-flow Pump under Different Flow Conditions   [Download Pdf][in English]
投稿时间:2015-12-25  
DOI:10.6041/j.issn.1000-1298.2016.06.004
中文关键词:  斜流泵  多工况  涡量  粒子图像测速
基金项目:国家自然科学基金项目 (51409127、51579118)、国家博士后科学基金项目(2013M541614)、江苏省博士后基金项目(1301062C)、江苏省六大人才高峰项目(HYZB—002)、镇江市农业支撑项目(NY2013031)、江苏高校优势学科建设工程项目和江苏大学高级专业人才科研启动基金项目(13JDG105)
作者单位
施卫东 江苏大学 
季磊磊 江苏大学 
李伟 江苏大学 
邵佩佩 江苏大学 
李维强 江苏大学 
蒋小平 江苏大学 
中文摘要:为了探索斜流泵的内部流动特性并优化斜流泵设计,基于粒子图像测速技术(PIV)对斜流泵内部流场进行测量,分析了不同相位叶轮截面处的流线和速度分布以及小流量工况下的涡量分布。研究结果表明,在小流量工况下,由于受到叶片压力面旋涡流动和吸力面脱流的影响,叶轮内部的流动呈现径向运动趋势,且流动紊乱;随着流量增大,叶轮流场流线逐渐向轴向方向移动并沿着轮毂轮廓线流动,在大流量工况下叶片压力面附近靠近端壁处形成明显的旋涡结构。0.6倍流量工况下,当叶轮进口进入拍摄断面时,在叶轮内部形成一个顺时针旋转的负涡;当叶轮出口进入拍摄断面时,在导叶进口外缘出现正向涡量集中区域,且随着叶轮的转动该区域向导叶进口方向移动;当叶片出口远离拍摄断面时,在导叶进口处出现负涡量区,揭示了斜流泵叶轮和导叶动静相干过程中能量损失的内在原因。
Shi Weidong  Ji Leilei  Li Wei  Shao Peipei  Li Weiqiang  Jiang Xiaoping
Jiangsu University,Jiangsu University,Jiangsu University,Jiangsu University,Jiangsu University and Jiangsu University
Key Words:mixed-flow pump  multi-conditions  vorticity  particle image velocimetry
Abstract:In order to explore the internal flow characteristics of mixed-flow pump and optimize and improve the design method of the mixed-flow impeller and guide vane, the internal flow field of mixed-flow pump was measured based on the particle image velocimetry (PIV). The streamline and velocity distribution of impeller section at different phases and the vorticity distribution under small flow rate conditions were analyzed. The results showed that radial trend of flow was appeared in the impeller due to influence of vortex flow on the blade pressure surface and flow separation of suction surface under small flow rate conditions, and the flow was turbulent. With the increase of flow rate, the streamline was turned gradually in the axial direction and flows along with the contour line of hub. Under the large flow rate conditions, the vortex structures near blade pressure surface and close to the wall were obvious. At 0.6 times of the working condition, when impeller inlet came to the shooting section, clockwise rotation vortex was formed within the impeller; when impeller outlet came to the shooting section, the positive vorticity concentrated area appeared near the guide vane inlet edge and this region was moved in the inlet direction with rotation of impeller. When the blade outlet kept away from the shooting section, the negative vorticity concentrated area was appeared near the guide vane inlet. The causes of mixed-flow pump energy loss were revealed during the process of rotor-stator interaction between impeller and guide vane. The research results provided reference for revealing the internal flow characteristics and expanding the operation ranges of the 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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