采用BALDWINLOMAX两层湍流模型,用有限差分法对V型条纹薄膜的流场进行了计算;分析了条纹薄膜的减阻特性,提出了具有最佳减阻效果的V型条纹薄膜设计准则.结果表明:当小筋倾角θ约等于60°时,条纹薄膜减阻效果最好,减阻量可达11％,而且减阻范围宽,H+值在5~10之间.“,”Previous methods for computing drag reduction of longitudinal riblets failed to agree well with known experimental data. We now present a numerical method that seems to be better. Based on the BaldwinLomax twolayer turbulent model, the flow on longitudinal Vshaped riblets was analyzed with a finitedifference method. Eqs.(7)～(11) were solved numerically through a curvilinear orthogonal grid with dense meshes near the tip and coarse meshes at the bottom (Fig.3). Computational results are in closer accord with...