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.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2006年第2期235-237,共3页
Journal of Engineering Thermophysics
关键词
斜蜗壳
多翼风机
数值分析
实验研究
CFD
inclined volute
multi-blade fan
numerical analysis
experimental research
CFD
作者简介
游斌（1972-），男，湖南长沙人，博士后，主要从事流体机械CAD优化设计与CFD耦合研究。
