非定常吸込み吹出しのある平板境界層の数値解

概要

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A theoretical consideration of the interaction of small disturbances with the time mean velocity distribution is presented. The consideration is restricted to the laminar boundary layer over a flat plate with uniformly distributed two dimensional sinks and sources. The blowing and suction rates of these sinks and sources vary in time and space sinusoidary so that the sinks and sources seem to progress with wave motion. The velocity amplitude of these sinks and sources is very small compared with the uniform flow velocity. The fundamental equations for this boundary layer are obtained and solved numerically. From these solutions, it is shown that the time mean friction rate is very different from the steady state one, even when the disturbances are very small. And it is also shown that the approximate and the numerical solutions are in good agreement with each other.
独立行政法人海上技術安全研究所の論文
1974-03-30