丁涛,施正香,杨建宝,方露梦,宏帅,孙宝玺.开放式奶牛舍扰流风机扩散器性能参数优化[J].农业机械学报,2016,47(3):319-327.
Ding Tao,Shi Zhengxiang,Yang Jianbao,Fang Lumeng,Hong Shuai,Sun Baoxi.Optimization of Diffuser Parameters of Mixing Flow Fans in Open Dairy House[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(3):319-327.
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开放式奶牛舍扰流风机扩散器性能参数优化   [下载全文]
Optimization of Diffuser Parameters of Mixing Flow Fans in Open Dairy House   [Download Pdf][in English]
投稿时间:2015-11-09  
DOI:10.6041/j.issn.1000-1298.2016.03.045
中文关键词:  开放式奶牛舍  扰流风机  扩散器  数值模拟  参数优化
基金项目:国家自然科学基金项目(31402115)、国家奶牛产业技术体系项目(CARS-37)和公益性行业(农业) 科研专项 (201303091)
作者单位
丁涛 中国农业大学 
施正香 中国农业大学
农业部设施农业工程重点实验室 
杨建宝 中国农业大学
北京市供水管网与安全节能中心 
方露梦 中国农业大学
北京市供水管网与安全节能中心 
宏帅 中国农业大学
北京市供水管网与安全节能中心 
孙宝玺 中国农业大学
北京市供水管网与安全节能中心 
中文摘要:为了提高奶牛舍夏季扰流风机的降温效果,在不改变扰流风机外形尺寸以及叶片形状的条件下,通过数值模拟以及现场实验的方法,优化扰流风机扩散器性能参数来提高风机性能。选取扩散器的开合角为90°、120°、150°和180°,以及扩散器的长度为150、250、350、450、550、650mm,利用CFD数值模拟建立了24种扩散器扰流风机的几何模型,以扰流风机性能、距扰流风机轴心0.5~1.0m处的流场速度分布以及气流不均匀系数为评价指标,优化了扰流风机扩散器开合角和长度。结果表明,150°/250mm扩散器使得扰流风机的风量提高了3.80%,能效比增加11%,轴心速度较大,且气流均匀性较好。
Ding Tao  Shi Zhengxiang  Yang Jianbao  Fang Lumeng  Hong Shuai  Sun Baoxi
China Agricultural University,China Agricultural University;Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture,China Agricultural University;Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System,China Agricultural University;Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System,China Agricultural University;Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System and China Agricultural University;Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System
Key Words:open dairy house  mixing flow fan  diffuser  numerical simulation  parameter optimization
Abstract:In summer, the mixing flow fans (MMF) are usually used to reduce the heat stress in dairy cows. In order to improve the cooling effect of mixing flow fans (MMF) in summer open dairy house, numerical simulation and field experiment were adopted to optimize the performance of MMF, without changing the dimensions and blade shape. Totally 24 geometry models of MMF with diffusers of different angles (90°, 120°, 150° and 180°) and different lengths (150mm, 250mm, 350mm, 450mm, 550mm and 650mm) were established for CFD simulation, and the angles and lengths of diffuser were optimized by taking the fan performance, wind speed distribution in the distance of 0.5~1.0m from MMF axial and non uniform coefficients as evaluation indexes. In this thesis, the diffuser angle 90° was taken as an example, the best diffuser length of the diffuser angle 90° was elected according to the fan rotation speed distribution and the diffuser effect of overall calculated filed. The analysis of other diffusers angles(120°, 150° and 180°) used the same methods. The angle and length of the diffusers (90°/450mm,120°/350mm,150°/250mm) were better to improve the MMF air flow and flow field uniformity, making use of analysis the jet length and average axial velocity. Finally, according to the simulation and experimental results, the 150°/250mm diffuser increased the wind quantity and efficiency ratio by 3.80% and 11% respectively, and led to greater axial velocity and better non uniform coefficients. This improvement provides a theoretical basis for facility agriculture equipment while reducing production costs.

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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