王维军,王 洋,刘 洋,曹璞钰,李亚成,吕忠斌.低比转数变曲率叶型离心泵非定常流动分析[J].农业机械学报,2013,44(11):61-66.
Wang Weijun,Wang Yang,Liu Yang,Cao Puyu,Li Yacheng,Lü Zhongbin.Analysis on Unsteady Flow in Low Specific Speed Centrifugal Pump with Curvature Blade[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(11):61-66.
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低比转数变曲率叶型离心泵非定常流动分析   [下载全文]
Analysis on Unsteady Flow in Low Specific Speed Centrifugal Pump with Curvature Blade   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2013.11.011
中文关键词:  离心泵 分流叶片 变曲率叶片 低比转数 非定常流动 压力脉动
基金项目:国家自然科学基金资助项目(51239005)、江苏省自然科学基金资助项目(BK2009218)和江苏省研究生培养创新工程项目(CXLX13_662)
作者单位
王维军 江苏大学 
王 洋 江苏大学 
刘 洋 江苏大学 
曹璞钰 江苏大学 
李亚成 江苏大学 
吕忠斌 江苏大学 
中文摘要:运用Fluent流场计算软件,采用修正的RNG k-ε湍流模型、滑移网格技术和二阶隐式时间推进法,用SIMPLEC算法对压力和速度耦合求解,数值模拟了低比转数变曲率叶型离心泵定常压力场、速度场和非定常压力场,设定了不同工况下靠近隔舌区叶轮和蜗壳之间的3个监测点,得到了3点的均压脉动度,并将计算的外特性曲线与试验进行了比对。结果表明,短叶片抑制了工作面流动的分离,改善了叶片上压力分布,叶轮出口处的射流尾迹区得到了明显改善;隔舌附近监测点的压力脉动幅值与监测点到隔舌间的距离成正比;数值计算结果为该泵叶型设计提供了理论依据。
Wang Weijun  Wang Yang  Liu Yang  Cao Puyu  Li Yacheng  Lü Zhongbin
Jiangsu University;Jiangsu University;Jiangsu University;Jiangsu University;Jiangsu University;Jiangsu University
Key Words:Centrifugal pump Splitter blade Curvature blade Low specific speed Unsteady flow Pressure fluctuation
Abstract:The unsteady flow of the low specific speed centrifugal pump with curvature blade was simulated numerically by software Fluent, RNG k-ε turbulence model and sliding mesh technology. Three indicator points near tongue with impeller and volute were monitored and pressure fluctuation of those points was gotten. Then, the calculating values were compared with test values. The results show that splitter blades restrain the flow separation. The performance of the pump, the pressure distributions of the pump and jet-wake region are improved deeply. The pressure pulsation amplitude of the indicator points near the tongue is proportional to the distance between the volute tongue and points.

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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