Abstract

Developing pipe flow has been studied experimentally. Mean and fluctuating velocities are measured by a hot-wire anemometer for various inlet disturbance under the Reynolds number of 120000. Figures are shown for distribution of mean velocity and Reynolds stress and explanations are offered for observed phenomena. The investigation is made into effects of the disturbance at pipe inlet on mean characteristics of developing pipe flow. It is clarified that the flow with moderate initial disturbance develops more quickly than the flows with small or large disturbance.

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