摘要
在原风机的基础上调整叶轮在蜗壳内的安放位置,采用正交试验方法,耦合叶轮在X轴,Y轴,Z轴三个方向上移动的距离为x,y,z三个因素,通过正交表确定试验方案。利用Fluent数值模拟软件,对各方案风机内部三维流场进行数值模拟和对比分析。研究结果表明,原风机叶轮安放位置不合适,使得蜗壳与叶轮的适配性较差,蜗壳流道内存在着较大的速度梯度,且二次流旋涡的强度较大。叶轮位置经过调整后可以有效减小蜗壳流道内的速度梯度和二次流旋涡,风机在设计工况下的效率提高了1.26%。
The placement of the impeller in the volute is adjusted on the basis of the original fan.The orthogonal test method is used to couple the three factors of the distance x,y,and z of the impeller moving in the three directions of X,Y,and Z,and the test scheme is determined by the orthogonal table.By using numerical simulation software fluent,the threedimensional flow field inside the fan of each scheme is numerically simulated and compared and analyzed.The research results show that the impeller position of the primary fan is not suitable,which makes the poor adaptability of the volute and the impeller.There is a large velocity gradient in the volute passageway,and the intensity of the secondary flow vortex is large.After adjusting the impeller position,the velocity gradient and secondary flow vortex in the volute flow channel can be effectively reduced,and the efficiency of the fan under the design working condition is increased by 1.26%.
作者
詹婷军
王军
李艺铭
肖千豪
Ting-jun Zhan;Jun Wang;Yi-ming Li;Qian-hao Xiao(Huazhong University of Science and Technology)
出处
《风机技术》
2020年第4期11-15,共5页
Chinese Journal of Turbomachinery
基金
国家重点研发计划(No.2018YFB0606101)。
关键词
离心风机
叶轮
蜗壳
相对位置
正交试验
Centrifugal Fan
Impeller
Volute
Relative Position
Orthogonal Test
