李贵东,王洋,曹璞钰,周国辉,吴文,韩亚文.射流式离心泵非设计工况下内部流动研究[J].农业机械学报,2015,46(8):48-53.
Li Guidong,Wang Yang,Cao Puyu,Zhou Guohui,Wu Wen,Han Yawen.Internal Flow of Flow-ejecting Centrifugal Pump under Off-design Conditions[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(8):48-53.
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射流式离心泵非设计工况下内部流动研究   [下载全文]
Internal Flow of Flow-ejecting Centrifugal Pump under Off-design Conditions   [Download Pdf][in English]
投稿时间:2014-09-10  
DOI:10.6041/j.issn.1000-1298.2015.08.008
中文关键词:  射流式离心泵  非设计工况  流场分析  数值模拟
基金项目:国家高技术研究发展计划(863计划)资助项目(2011AA100506)、江苏高校优势学科建设工程资助项目和江苏省普通高校研究生科研创新计划资助项目(KYLX15_1064)
作者单位
李贵东 江苏大学国家水泵及系统工程技术研究中心 
王洋 江苏大学国家水泵及系统工程技术研究中心 
曹璞钰 江苏大学国家水泵及系统工程技术研究中心 
周国辉 福建巨龙电机集团有限公司 
吴文 江苏大学国家水泵及系统工程技术研究中心 
韩亚文 江苏大学国家水泵及系统工程技术研究中心 
中文摘要:为了研究射流式离心泵在非设计工况下的内部流动特性,选取JETST-100型射流式离心泵作为研究对象,运用CFX软件提供的RNG k-ε湍流模型,对模型泵内部流动情况进行了三维非定常数值模拟,得到各过流部件内部的速度场和压力场分布等流动信息,比较了在不同运行流量下,射流器进口和喉管处质量流量的变化情况,并将模拟结果与试验进行对比。结果表明:射流器内部压力最高区域在喷嘴进口处,低压区域在喉管附近,喷嘴附近速度最大,抽送液体的进流口速度最小;叶轮中流出的液体大部分回流至射流器进口,随着泵运行流量的减小,回流所占射流器喉管处质量流的比例增加;对叶轮内的流动分析显示,叶片吸力面的速度普遍高于压力面的速度,进一步影响了该型泵的运行效率。
Li Guidong  Wang Yang  Cao Puyu  Zhou Guohui  Wu Wen  Han Yawen
National Research Center of Pump, Jiangsu University,National Research Center of Pump, Jiangsu University,National Research Center of Pump, Jiangsu University,Fujian Glong Electric Group Co., Ltd.,,National Research Center of Pump, Jiangsu University and National Research Center of Pump, Jiangsu University
Key Words:Flow-ejecting centrifugal pump  Off-design conditions  Flow analysis  Numerical simulation
Abstract:In order to study the internal flow characteristics in the flow passage components of flow-ejecting centrifugal pump under off-design conditions, the type JETST-100 self-priming pump was selected. It consists of seven parts: the inlet pipeline, jet aerator, wear ring, elbow, impeller, outlet pipeline and pump chamber. The transient numerical simulation for internal flow situation of computational model was carried out based on RNG k-ε turbulence model by using CFX software. The flowing information of velocity and pressure in flow passage components of centrifugal pump were obtained. Comparison of flow change between inlet and throat of jet aerator under different operating conditions was performed and the simulation results were compared with the test results. The results showed that the highest pressure area of jet aerator was located at the inlet of nozzle, low pressure area was located at the vicinity of throat, and the maximum velocity occurred at the area of the vicinity of nozzle, the minimum velocity generated at the inflow part of suction liquid. With the flow rate decreased, mass flow rate of reverse flow in throat of jet aerator was increased; effluent liquid from the impeller was mostly reversed to the inlet of jet aerator. The flowing analysis of impeller showed that the blade suction surface velocity was generally higher than the blade pressure surface velocity, which further affected the operating efficiency of the pump. The study results will supply a theoretical reference for hydraulic optimization design of the internal flow status of flow-ejecting centrifugal pump under off-design conditions.

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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