前置导叶对畜禽舍轴流风机性能的影响  

Influence of inlet guide vane on the performance of axial fan for livestock and poultry farming

作　　者：丁涛[1] 邱绵靖 刘志伟[3] 李妥 施正香[1,4] DING Tao;QIU Mianjing;LIU Zhiwei;LI Tuo;SHI Zhengxiang(College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China;Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System,Beijing 100083,China;Infrastructure Construction Department,China Agricultural University,Beijing 100081,China;Key Laboratory of Agricultural Engineering in Structure and Environment,Ministry of Agriculture and Rural Affairs,Beijing 100083,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]北京市供水管网与安全节能中心,北京100083 [3]中国农业大学后勤基建处,北京100081 [4]农业农村部设施农业工程重点实验室,北京100083

出　　处：《农业工程学报》2023年第14期80-88,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：新疆维吾尔自治区重大科技专项项目(2022A02005-1);国家自然科学基金区域创新发展联合项目(U20A2020);国家现代农业产业技术体系资助项目(CARS36)。

摘　　要：畜禽养殖过滤除臭装置对传统轴流风机负压抽吸能力提出了更高的要求。为提高传统轴流风机的气动性能,扩大其有效工作区间,该研究以550型农用轴流风机为对象,结合试验和数值模拟研究了前置导叶对轴流风机性能的影响。通过单因素和响应面分析方法,对前置导叶的导叶安装角(α)、轴向间距(L)、导叶个数(n)对风机性能和流场的影响进行研究,分析各因素对风机性能的影响,求解出最佳参数组合。通过3D打印制作前置导叶并进行样机试验。结果表明,增设前置导叶后,风机内部区域涡流得到削弱,降低了流动损失,静压效率提高,流动剧烈程度降低,流场更稳定,叶片静压差增大,风机叶片的做功能力增强,与传统结构相比,增设前置导叶后风机通风量和能效比均明显提升,通风量提升幅度在5.7%~10.39%,能效比提升幅度在6.62%~10.89%;在静压50 Pa下,通风量提升6.76%,能效比提升7.75%。研究结果证明了增设前置导叶提升轴流风机负压抽吸能力的可行性。Higher capacity of negative pressure suction has been required in the traditional agricultural axial fan,particularly with the increase of filtration and deodorization devices in livestock and poultry farming.This study aims to improve the aerodynamic performance of agricultural axial fans,and then to expand their working range.A common type-550 axial fan was taken as the research object.The inlet guide vanes were added under the experiments and numerical simulations.The single factor and response surface analysis were selected to investigate the effects of guide vane installation angle(α),axial distance(L),and number of guide vane(n)on the fan performance and flow field.The influence of each factor on the performance of the fan was then obtained,according to the response surface analysis.The best combination of installation parameters was achieved for the better performance of the axial fan.A series of 3D-printed fan and tunnel experiments were carried out to verify the best combination of installation parameters of inlet guide vanes.Numerical simulation results showed the improved performance was represented by four perspectives after the addition of the inlet guide vane.Firstly,the inlet guide vane was adjusted to a suitable installation angle.After that,the meridian plane axial velocity increased significantly to black the leakage vortex extension to the inlet.As such,the static pressure efficiency was improved,due to the weak internal vortex,and the reduced flow loss.Secondly,the inlet guide vane was adjusted to a suitable installation distance.The fully pre-rotating was found in the inlet flow of the high span,leading to a more uniform flow in the axial flow fan.Thirdly,a suitable number of blades was set in the inlet guide vane.There was a decrease in the intensity of flow change in the inner channel of the axial flow fan,indicating a more stable flow field.Finally,there was an increase in the static pressure difference at the limit position of the blade pressure surface and suction surface,particularly w

关 键 词：数值模拟 试验 轴流风机 气动性能 前置导叶 畜禽养殖 

分 类 号：TH43[机械工程—机械制造及自动化] S24[农业科学—农业电气化与自动化]