低压轴流风扇性能的改善  

Research on the performance improvement of the low pressure axial flow fan

作　　者：王嘉冰[1] 李荣 杨九铭 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]广东美的集团股份有限公司,广东顺德528311

出　　处：《华中科技大学学报（自然科学版）》2007年第1期73-76,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50176012)

摘　　要：在轴流叶轮常规准三维设计方法的基础上，采用前缘弯掠技术，运用CFD／CAD方法对空调器轴流风扇进行耦合设计，并且应用三维纳维一斯托克斯方程和spalart-Allmaras湍流模型分别对国外样机风扇和新风扇进行了数值分析与性能实验．实验测试结果和内流计算结果符合较好，验证了设计方法的可行性和数值计算的有效性．研究结果还表明，采用大前弯角度和前掠角度的新轴流风扇减小了叶道中二次涡的影响范围，主流区域增大，基本消除了前缘分离现象；在气动性能基本保持不变的情况下，风扇噪声可降低0．5～1．3dB（A级声压级）．Based on the conventional qusi-3D design system, the CFD/CAD design method and the leading edge skewed-swept technique are studied on the axial flow fan used in the air conditioner system. The performance of model fan and the new designed fan are measured experimentally and analyzed numerically by solving three-dimensional Reynolds-averaged Navier-Stokes equations with the Spalart-Allmaras turbulent model. The numerical results show good agreement with the experimental data, which indicates the feasibility of the design method and the validity of the numerical simulation. The results have disclosed that the secondary vortices flow region in the blade passage could be diminished when large forward skewed-swept angle is applied. The main flow region is enlarged and the separated flow at leading edge is almost eliminated. The fan noise could reduce by 0.5-1.3 dB（A） without any negative influence on the aerodynamic performance of the fan.

关 键 词：轴流风扇 前缘弯掠叶片 内流 噪声 

分 类 号：TH432[机械工程—机械制造及自动化]