【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-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).更多还原

【Abstract】 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.更多还原