本文以轻型货车为例,通过对其所作的风洞研究,指出从空气动力学的角度对驾驶室外形采取完善措施而产生的降低风阻的作用。另外,还说明了各种货车车身对空气动力特性(尤其是在斜向气流下)的巨大影响。可以看出,在现今的技术水平下,降低风阻所能获得的经济利益,至少和由于改善发动机和传动系所达到的经济利益,在数量级上是相等的。 Taking the light goods vehicle as an example, this paper points out the role of air resistance in reducing the wind resistance caused by taking perfect measures to the cab shape from the aerodynamic point of view. In addition, it also illustrates the huge impact of various truck bodies on aerodynamic characteristics, especially under oblique airflow. It can be seen that at today’s technological level, the economic benefits of reducing windage are at least as much as the same order of magnitude as the economic benefits of improving the engine and driveline.