基于微流驱动效应的汽车前风挡除水机制研究

Mechanism Research of Vehicle Windshield Rainwater-removing Based on Microflow Drive Technique

基于微流驱动效应的优越性,提出了一种汽车前风挡玻璃振动除水技术。首先采用Stokes长波理论构建了液滴的二维数学模型,然后借助COMSOL MULTIPHYSICSICS多物理场分析软件对玻璃板上的液滴进行二维建模。研究了对称低频振动、正交对称低频运动、非对称振动和对称低频振动对液滴移动状态和移动速度的关系。仿真结果表明:液滴在振动激励下始终保持一种非对称的往复振荡运动,这种非对称运动合成为液滴在宏观上的位移,验证了微流驱动效应除水技术的可行性与有效性。

Based on advantages of microflow drive technique, a kind of vehicle windshield vibration rainwater-removing technology was proposed. Firstly, the two dimensional （2D） mathematical model of the droplet was built by using the Stokes of long wave theory, then the 2D droplet-glass model was built with the finite element analysis （FEA） software COMSOL MULTIPHYSICS. The research on relationship was carried out between symmetric low frequency vibration, the orthogonality symmetry low frequency vibration, the asymmetric frequency vibration and the symmetry low frequency vibration to movement state and speed of the droplet. The simulation results show that the droplet oscillates asymmetrically under excitation of vibration which leads to its obvious displacement macroscopically. It verifies that a windshield rainwater-removing technology based on microflow drive technique is feasible and effective.