内部声激励对汽车空气阻力影响的研究

Experiment Investingation of Reducing Automobile Aerodynamic Drag by Acoustic Excitation Technique

提出一种降低汽车高速行驶时空气阻力的方法─—声激励减阻法。在风洞中，对某型大客车的缩尺模型，进行有、无声激励情况下空气阻力系数测试的对比试验。实验结果表明，声激励技术能较明显地降低模型的空气阻力系数，初步验证了该方法的可行性。

A new method (Reducing aeredynamic drag by acoustic excitation)of reducing automobile aeredynamic drag at high speed. For a scaled model of the bus,the contrast experiments of aerodynamic drag coefficient of acoustic excitation with that of no acoustic excitation in the wind tunnel were carried out. It is shown that acoustic excitation can clearly reduce the aeredynamic drag of the model. It is proved that the kind of technique is feasible in reducing aerodynamic drag of automobile.