玉形弁下流における流れ加速型腐食（流れ場の測定と数値計算）

スポンサーリンク

概要

• 論文の詳細を見る

• In order to evaluate the effects of flow field on flow accelerated corrosion (FAC), the flow field downstream from a globe valve was measured using laser Doppler velocimetry (LDV) and particle image velocimetry (PIV) and was simulated by unsteady RANS (URANS). The globe valve was a cage guided type and a column between cage windows was placed perpendicular to the flow direction. The diameter of a downstream pipe was 50 mm, and mean cross-sectional velocity was about 2 to 6 m/s. Swirl flow with twin vortices was visualized by PIV and simulated by CFD in the cross section downstream from the globe valve. The flow-directional velocity profiles measured by LDV and simulated by URANS under different velocity conditions coincided with each other when profiles were normalized by the mean velocity. It indicated 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 on the lower wall than those on the upper wall.

著者

• 村瀬 道雄

  （株）原子力安全システム研究所

• 中村 晶

  （株）原子力安全システム研究所

• 歌野原 陽一

  （株）原子力安全システム研究所

• 長屋 行則

  （株）原子力安全システム研究所

関連論文

• 配管減肉管理規格改定に向けた研究開発ロードマップ
• 玉形弁下流における流れ加速型腐食（流れ場の測定と数値計算）
• Evaporation Heat Flux from Hot Water to Air Flow
• Time-Averaged and Fluctuated Wall Shear Stresses Downstream from an Orifice in a Circular Pipe
• 下向き閉塞分岐配管に生じる流動と温度変動のメカニズム（第5報，侵入深さの変動メカニズムの解明）

スポンサーリンク