贯流风机叶轮参数的模拟研究  

Numerical Investigations on the Impeller Parameters of the Cross Flow Fan

作　　者：舒朝晖[1] 张强[1] 段亚雄 SHU Zhao-hui;ZHANG Qiang;DUAN Ya-xiong(Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《流体机械》2017年第11期22-28,共7页Fluid Machinery

基　　金：广东省科技计划项目(2013B090600061)

摘　　要：贯流风机叶轮参数对风机性能有着决定性的影响,基于某企业提供的原型叶轮,通过二维稳态模拟探讨了叶轮前后缘半径Ri与Ro、叶片倾角a以及叶片弯度角γ等3个重要叶片参数对空调用贯流风机流场和性能的影响。结果表明,叶片前后缘半径比对叶片壁面边界层分离存在较大影响,当Ri/Ro>1时,通常能够较好地抑制边界层分离,得到较大的出口流量;对于原型叶片而言,其倾角a的最佳取值范围介于25°到30°之间,且随a增大,叶轮入口流场波动减小;弯度角γ越大,叶轮对气流做功越多,γ为90°时,取得最大流量值716.47 m3/h,相比原叶轮,流量提升4.04%。Impeller parameters have great effect on the performance of the cross flow fan.Based on the blade provided by a company,the influences of several important blade parameters such as leading radiu(Ri),rear radiu(Ro),blade tilt angle(a)and camber angle(γ)on the flow field and performance of the cross flow fan,has been studied by two-dimensional steady simulation.The results show that,the ratio of Ri and Ro has great effect on boundary-layer separation of the blade surface,the boundary layer separation is inhibited and higher outlet flow rate is obtained when Ri/Ro>1.Blade tilt angle a of the prototype blade can be chosen in the ranges25°≤a≤30°,and in which range,the fluctuation of the impeller inlet flow decreases with a increases.The greater the camber angleγ,the more the impeller works on the airflow.Moreover,whenγis equal to90°,the flow rate achieves the maximum of716.47m3/h,enhanced4.04%compared to the original impeller.

关 键 词：贯流风机 叶轮参数 流场特性 风机性能 

分 类 号：TH43[机械工程—机械制造及自动化]