Study on Flow Field around Guide Vane in Curved Circular Pipe

概要

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In order to reduce fluid loss, a guide vane is often used in a curved pipe. However, recently, some vibration or damage problems of the guide bane are reported. This is assumed that these problems are related to FIV (Flow Induced Vibration), but there are few researches about vibration or damage problems. In this paper, flow field around the guide vane in a curved circular pipe was studied. Recently, in order to reduce costs, a curved fitting is often used, instead of using a curved circular pipe. So, CFD analysis was conducted to check differences of flow field in a curved circular pipe and in a curved fitting. And there was no big difference between these results. In addition, PIV measurement was conducted to study instantaneous flow field behind a guide vane, and vortex shedding from the trailing edge of the guide vane was observed.
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