The key of automobile model-windtunnel test is the similarity between the model and the real vehicle with a very large Reynolds number in the test and the simulation 0f the ground effect.

• 汽车缩尺模型风洞试验技术的关键是缩尺模型与真车的几何相（包括底板和发动机室这些细节部分）、试验中的雷诺数足够大，以及地面边界效应的模拟.