ground boundary layer meaning in Chinese

地面附面层

From the vehicle safety angle , it provides theory and technical support for the research on automatic drive , intelligent drive and traffic safety . this paper is based on the study of single car external flow field about the simulation on the ground boundary layer , the rotating wheels and the crossing wind load , and on the two cars running - in - row and overtaking maneuvers
同时使用稳态超车的研究方法,利用了阶背式、快背式和厢式mira模型代替轿车模型进行了不同车型超车过程的对比研究,利用定性和定量两种方法研究了不同轿车车型在超车过程中的异同。