曲がり円管内に取り付けられた案内羽根周りの流動状態(流体工学,流体機械)

概要

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With respect to vibration problems of a guide vane, this vibration phenomenon seems to be generated by the fluid exciting force, which works on the guide vane in unsteady flow field. Thus, in order to understand the vibration mechanism of the guide vane, it is important to reveal unsteady flow field in the curved pipe with the guide vane. In this study, the difference of flow condition between a curved circular pipe and an elbow pipe fitting was inventigated by Computational Fluid Dynamics (CFD) using Reynolds Averaged Navier-Stokes Simulation (RANS). As a result of this study, there is no big difference between both flow conditions. Moreover, unsteady flow field in the curved circular pipe was investigated by Particle Image Velocimetry (PIV) measurements. This experiment was mainly carried out with focusing on unsteady flow field around the trailing edge of the guide vane. The results show that the vortex street is sometimes generated from the trailing edge of the guide vane.
一般社団法人日本機械学会の論文
2006-10-25