沙毅,朱颖,武鹏,李其朋,王宇,李春蓄.旋流泵菜籽-水两相流浓度特性实验与流场数值模拟[J].农业机械学报,2019,50(5):173-180.
SHA Yi,ZHU Ying,WU Peng,LI Qipeng,WANG Yu,LI Chunxu.Hydrotransport Test with Variable Rapeseed Concentration and Flow Field Numerical Simulation of Vortex Pump[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(5):173-180.
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旋流泵菜籽-水两相流浓度特性实验与流场数值模拟   [下载全文]
Hydrotransport Test with Variable Rapeseed Concentration and Flow Field Numerical Simulation of Vortex Pump   [Download Pdf][in English]
投稿时间:2018-11-03  
DOI:10.6041/j.issn.1000-1298.2019.05.020
中文关键词:  旋流泵  固液两相流  流场  数值计算
基金项目:浙江省食品物流装备技术研究重点实验室开放基金项目(KF2016020yb)和国家自然科学基金项目(51677171)
作者单位
沙毅 浙江科技学院
浙江省食品物流装备技术研究重点实验室 
朱颖 浙江科技学院 
武鹏 浙江省食品物流装备技术研究重点实验室
浙江大学 
李其朋 浙江科技学院 
王宇 浙江科技学院 
李春蓄 浙江科技学院 
中文摘要:为探索旋流泵固液两相流内部流场及变浓度输送特性,分析了旋流泵固液两相流动基本原理及其特点。在32WB8-12型样机上完成输送清水及菜籽体积分数CV分别为6%、10%的外特性实验,得出泵流量-扬程、流量-轴功率、流量-效率和流量-临界汽蚀余量性能曲线。采用Mixture多相流模型及RNG k-ε湍流模型,对旋流泵在清水最优工况流量qv=9.31m3/h下输送菜籽固液两相流流场进行了数值模拟,求解采用SIMPLE算法,得到3个轴面静压、速度矢量和固粒体积分数分布图。通过对比分析,数值模拟准确性得到了验证。综合分析了泵外特性变化与内部流场之间的定性因果关系,并提出了两相流泵优化设计改进措施。
SHA Yi  ZHU Ying  WU Peng  LI Qipeng  WANG Yu  LI Chunxu
Zhejiang University of Science and Technology;Zhejiang Provincial Key Laboratory of Food Logistics Equipment and Technology Research,Zhejiang University of Science and Technology,Zhejiang Provincial Key Laboratory of Food Logistics Equipment and Technology Research;Zhejiang University,Zhejiang University of Science and Technology,Zhejiang University of Science and Technology and Zhejiang University of Science and Technology
Key Words:vortex pump  solid-liquid two phase flow  flow fields  numerical calculation
Abstract:In order to study the solid-liquid two phase flow field and the hydrotransport characteristics of variable concentration in vortex pump, the basic principle and characteristics of solid-liquid two phase flow in vortex pump were summarized analytically and the characteristics of solid-liquid two phase flow were discussed based on the following aspects: energy exchange between solid and liquid, the round flow of particles and the interference between particles. The performance test of clean water and rapeseed volume fraction of CV=6% and CV=10% hydrotransport were conducted on a self built vortex pump (32WB8-12). Through the experiments, performance curves, such as qv-H, qv-P, qv-η and qv-NPSHc, were obtained. Based on the mixture multiphase flow model and the modified k-ε two equation turbulent model, the interior two phase flow field of rapeseed liquid hydrotransport under the clear water optimal condition flow qv=9.31m3/h was numerically simulated by using SIMPLE algorithm. The pressure, velocity and sandy volume fraction, distributed on three cross sections of the vortex pump, were obtained through the numerical modeling. Meanwhile, the simulation results also showed that the rapeseed particles were mainly gathered at axial vortex center in the impeller and the annular district confront impeller in the chamber as well as around the blade inlet, and the accuracy of the numerical simulation results was verified by comparing between simulation and experiment. By comprehensive analysis, the relationship between performance and parameters of the internal flow was explained, the variable concentration similar conversion of NPSH and improvement measures for optimizing the design of the two phase flow pump were proposed.

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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