Clark Millikan’s work on the boundary layer and skin friction for a figure of revolution is extended, with particular reference to the completely turbulent boundary layer, in two ways:ududa) His expressions for the completely turbulent regime are generalized so as to hold for the assumption of a one n-th power law for the velocity distribution in the boundary layer;ududb) Von Karman’s logarithmic velocity distribution is introduced into the analysis.ududb) leads to a practical method by which the drag of a full-scale dirigible can be predicted from wind tunnel tests.ududComparison of the theory as gotten from b) with experiments leads to the conclusion that the present theory can be safely used to predict drags at large Reynolds’ numbers, whereas drags predicted on the basis of a one seventh power law may be from 20% to 30% low.
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机译：克拉克·米利坎（Clark Millikan）对界线和皮肤摩擦力的旋转图形的工作得到了扩展，特别涉及了完全湍流的边界层，其方式有两种： ud uda）他对完全湍流状态的表述被概括化了，以保持假设边界层的速度分布为n次幂定律; ud udb）将冯·卡曼的对数速度分布引入分析中。 ud udb）提出了一种实用的方法可以从风洞试验中预测满刻度飞船的总功率。 ud ud与b）进行的理论比较与实验得出的结论是，本理论可以安全地用于预测大雷诺数的阻力，而根据第七次幂定律预测的阻力可能会低20％至30％。
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