导叶叶型耦合进口角设计对混流风机气动性能的影响研究  

Effects of the Guide Vane Profile Coupling the Blade Inlet Angle on Aerodynamic Performance of Mixed-flow Fan

作　　者：刘董节 雷国茂 潘文康 刘小民[1] Dong-jie Liu;Guo-mao Lei;Wen-kang Pan;Xiao-min Liu(School of Energy and Power Engineering,Xi'an Jiaotong University;GD Midea Environment Appliances MFG,Co.,Ltd.)

机构地区：[1]西安交通大学能源与动力工程学院 [2]广东美的环境电器制造有限公司

出　　处：《风机技术》2024年第6期19-25,共7页Chinese Journal of Turbomachinery

基　　金：陕西省重点研发计划(2023-YBGY-280)。

摘　　要：为探索无叶风扇用混流风机后置导叶对风机流量和效率的影响,本文首先基于气流经混流式叶轮后的流动轨迹特性,设计了螺旋型导叶叶片。然后采用CFD数值模拟方法研究了不同导叶叶片包角及不同叶片轮毂与轮缘的进口角条件下的混流风机气动特性性能。与直型导叶叶片相比,新设计的螺旋型导叶叶片改善导叶进口处的流场分布,有效消除了导叶内部和出口处的涡流,降低了静压分布的梯度,这表明螺旋型导叶叶片在不同叶片包角下均能提高风机的流量。随着包角的增加,流量呈现出先增加后减小的趋势,在70°包角时,风机流量提升最为显著。较小的轮缘进口角度有利于增加风机流量,较小的轮毂进口角度则有利于减少流动分离。与直型导叶叶片相比,本文最优设计方案使混流风机的流量增加了0.108Qm^(3)/h,静压效率提高了2.74%。In order to investigate the effect of the rear guide vane of the mixed-flow fan for bladeless fan on the flow and efficiency,this paper designs firstly the spiral guide vane blade based on the flow trajectory characteristics of the air flow after passing through the mixed-flow impeller.And then,CFD numerical simulation method is used to study the performance of the mixed-flow fan aerodynamic characteristics under the different guide vane blade wrap angles and different blade hub and shroud inlet angles conditions.Compared with the straight guide vane,the spiral guide vane improves the flow field distribution at the inlet of the guide vane,eliminates the vortex inside the guide vane,and reduces the gradient of the static pressure distribution.This indicates that the spiral guide vane can improve the flow rate of the fan under different blade wrap angles.As the wrap angle increase,the flow rate shows a trend of increasing and then decreasing,and the most significant increase in the flow rate of the fan at 70°wrap angle.Moreover,a smaller shroud inlet angle is favorable to increase the fan flow while a smaller hub inlet angle is favorable to reduce flow separation.Compared with the straight guide vane blade,the optimal design scheme in this study increased the flow rate of the mixed flow fan by 0.108Qm^(3)/h and the static pressure efficiency is increased by 2.74%.

关 键 词：混流风机 数值模拟 导叶叶型 叶片进口角 耦合优化 气动性能 

分 类 号：TH432.1[机械工程—机械制造及自动化]