文档介绍：车用轴流风机优化分析车用轴流风机优化设计摘要在汽车空调中,轴流风机作为空气循环的动力,需要克服系统的阻力为空调系统和发动机冷却系统提供冷却用风量。因此风机的效率与性能的研究显得尤为重要。本文采用理论分析、计算流体动力学仿真( CFD )以及性能试验相结合的方法,研究了轴流风机径向间隙对其性能的影响。从轴流风机的气体动力学理论可以知道, 轴流风机的叶轮一般是扭曲叶面,叶片尖端上容易产生涡流。因此如果叶片尖端与外壳的间隙不恰当,不仅会降低通风机的效率与性能,还会额外地增加通风机的噪声,缩短通风机的使用寿命。在径向平衡方程的建立过程中,分析得出了径向间隙对涡流产生的影响。基于以上理论,建立了一个基于计算机的三维风机模型,从理论上分析了风机参数对风机性能的影响, 同时搭建风量试验台对轴流通风机进行了性能试验, 通过实验获得的数据与轴流通风机的 CFD 仿真分析作比较,验证模型的可靠性。同时通过改变 CAD 模型中的径向间隙,对不同径向间隙的轴流通风机流场进行对比,得到了优化的风机设计。关键词: 车用轴流风机性能试验 CFD 径向间隙车用轴流风机优化分析 OPTIMIZATION OF AN AXIAL FAN USED IN AUTOMOTIVE Abstract In the vehicle, the cooling fans works as the driving force for the air-conditioning system and the engine cooling system. It ’ s critical for the fan to e the resistance to ensure sufficient air volume. So the efficiency and performance of fan is very important for the AC system and the Engine cooling system. In this paper, theoretical analysis, computational fluid dynamics and experiments are used to analyze the impact of radial clearance in Axial Fan performance. The impeller of the axial fans is generally distorted foliage according to the Axial Fan ’ s ic theory, so cutting-edge blade easily lead to vortex. Then if radial clearance of an Axial Fan is not appropriate, the fan will not only reduce the efficiency and performance, but also an additional increase in the fan noise, sh orten the life of Fan. Derived from the Radial balance equation, the radial clearance is impact of the vortex. Based on the above theory, we have produced an establishment of a computer-based three-dimensional model of fans. And a fan performance test equipment to test the exiting axial fan performance, not only in theory analysis parameters on the blower fan of the performance but also according to the experimental data pute the Axial plex flow field within the CFD simulation analysis software. At the same time by changing the CAD model of radial cle arance, the different radial clearances of the axial flow fan pared for