一、前言飞行器表面是不可能做得绝对光滑的。实际上飞行器表面本身的加工光洁度不高,或者由于表面涂层使表面具有一定的粗糙度。如果粗糙度高度超过某一临界值就会引起附面层提前转捩,增加了飞行器的表面摩擦阻力;另一方面,飞行器表面不可能是理想图形,由于表面存在着铆钉头、接缝、口盖等凹凸物,引起阻力增加。本文提供了表面粗糙度对附面层转换影响的一些实验资料,从附面层转换的角度对飞行器表面粗糙度提出了要求。另外,对紊流附面层中零倾角平板上的圆腔、凹槽、二元台阶和凸沟、铆钉头引起的阻力,提供了实验 I. INTRODUCTION The surface of an aircraft can not be absolutely smooth. In fact the aircraft surface finish is not high, or due to the surface coating so that the surface has a certain degree of roughness. If the roughness height exceeds a certain critical value, it will cause the adherent layer to turn in advance, which increases the surface frictional resistance of the aircraft. On the other hand, the aircraft surface can not be an ideal figure. Due to the existence of the rivet head, the seam, the mouth Cover and other asperity, causing increased resistance. In this paper, some experimental data on the effect of surface roughness on the conversion of surface layer are provided. The surface roughness of the aircraft is put forward from the perspective of surface layer conversion. In addition, experiments were conducted on the cavities, grooves, bivariate steps and bosses, and the resistance caused by the rivet heads on the zero-dip angle plate in the turbulent overburden