C204 玉形弁下流における流れ加速型腐食の評価 : 1.流れ場の測定と数値計算(OS6 流れ加速型腐食)

概要

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In this study, in order to evaluate the effects of flow field on flow accelerated corrosion (FAC), the flow field downstream from the globe valve was measured using particle image velocimetry (PIV) and simulated by unsteady RANS (URANS). The diameter of a downstream pipe is 50mm, and mean cross-sectional velocity was about 2 to 4m/s. Swirl flow with twin vortices was visulalized by PIV and simulated by CFD in the cross section downstream from the globe valve. The simulated flow-directional velocity profiles under different velocity conditions were coincide with each other when profiles were normalized by the mean cross-sectional velocity. It indicates flow structure downstream from the globe valve did not depend on the flow velocity. Predicted wall shear stress and turbulent kinetic energy adjacent to the wall were higher in the lower wall than those in the upper wall.
一般社団法人日本機械学会の論文
2011-06-22