用时间模式对来流Mach数为4.5的平板边界层湍流进行了直接数值模拟.发现当湍流充分发展后,其平均流剖面、湍流Mach数、各种量的脉动均方根值和Reynolds应力等沿平板法向的分布都具有相似性.但压缩性效应已较强而必需考虑,强Reynolds比拟不再有效,Morkovin假说不再成立.从转捩完成至湍流充分发展之间有一过渡过程,其间上述相似性不成立. The numerical simulation of the turbulent flow in slab boundary layer with a Mach number of 4.5 was carried out by using the time model. It was found that the average flow profile, the turbulent Mach number, the rms value of the ripples and the Reynolds stress However, the compressibility effect is strong and must be considered, the strong Reynolds is no longer valid, the Morkovin hypothesis is no longer valid, and there is a transition from the completion of transition to the full development of turbulence The above similarity does not hold.