多翼风机新型斜蜗壳和常规直蜗壳的对比研究  

COMPARISON RESEARCH OF THE NEW-STYLE INCLINED VOLUTE AND THE STRAIGHT VOLUTE IN THE MULTI-BLADE FAN

作　　者：游斌[1] 周拨[1] 吴文新 谢军龙[1] 吴克启[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]广东美的企业集团博士后工作站,广东顺德528311

出　　处：《工程热物理学报》2006年第2期235-237,共3页Journal of Engineering Thermophysics

摘　　要：本文采用Navier-Stokes方程和K-ε两方程模型对多翼风机分别采用新型斜蜗壳和常规直蜗壳的内流特性进行了三维数值模拟和实验研究。新型斜蜗壳的蜗舌间隙沿轴向从底盘到进风口由6％变化到4％,同时间隙位置沿圆周方向偏移15°。计算结果表明采用新型斜蜗壳可以改善多翼风机蜗舌间隙内的压力和速度分布,消除近底盘区域的出口旋涡。实验结果表明,采用新型斜蜗壳可以提高多翼风机的压力,降低叶片通过频率噪音并能改善音质。A numerical flow analysis and experimental research have been designed to study the internal flow in the multi-blade fan. The researched fan was configured by a new-style inclined volute and a straight volute, respectively. Numerical simulation was based on Navier-Stokes equations coupled with k - ε turbulence model. From chassis side to pressure inlet side along the height of the blade, the minimum tongue clearance of the inclined volute varies from 6% to 4% of the impeller outside diameter; the minimum clearance position also varies 15° along the circumferential direction. The numerical results showed that the inclined volute could improve the pressure and the velocity distribution characteristic in the tongue clearance of the multi-blade fan. The new designed inclined volute could diminish the clearance vortex that existed near the chassis side of the multi-blade fan. The experimental results showed that the inclined volute could increase the static pressure and volume flow of the multi-blade fan to a certain degree, and the inclined volute could reduce the noise （especially the blade passing by frequency noise） and eliminate the aerodynamic whistle noise of the multi-blade fan.

关 键 词：斜蜗壳 多翼风机 数值分析 实验研究 CFD 

分 类 号：O35[理学—流体力学]