OS10-7 Flow characteristics of the free surface vortex in a cylindrical vessel

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  • OS10-7 円筒容器内自由表面渦の流動特性(OS10 混相流の計測技術と解析,循環型社会における動力エネルギー技術)

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The aim of this study is to reveal the basic flow characteristics of the free surface vortex.. For investigation on the working fluid effect, temperature of the fluid was varied. Flow configuration was altered by changing the water level.. We found out that all these parameters have considerable influences on the behavior of the free surface vortex. The flow field was measured by using PIV. The measurement results show a forced circulation region near the circulation center of the vortex, followed by a free circulation region surrounding the forced circulation region in the vortex structure. On the other hand, the flow field measured at the vertical cross section of the vortex revealed an uprising flow region over the exit drain hole.

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