Numerical simulation of large scale vortex structure and flow pulsation in rectangular channels

作者：Yan, B. H.^*; Gu, H. Y.; Yu, L.

来源：Progress in Nuclear Energy, 2012, 54(1): 29-35.

DOI：10.1016/j.pnucene.2011.09.006

• Vortex structure
• Flow pulsation
• Rectangular channel

The quasi periodic large scale vortex structure and flow pulsation in rectangular channels are investigated theoretically. Narrow gap or slot is not the necessary condition for the quasi periodic large scale vortex structure. The quasi periodic large scale vortex structure could be observed in flat rectangular channels with the same widths if appropriate velocity profile is available. The vortex structure and flow pulsation in velocity interface could be strengthened by the adjacent velocity interfaces. The effect of channel size on the vortex structure is significant. The quasi periodic large scale vortex structure and flow pulsation vanishes with the channel length decreasing. This work is helpful for the recognition of quasi periodic large scale vortex structure and strong turbulent mixing in rod bundles and channels.

• 出版日期2012-1
• 单位上海交通大学; 中国人民解放军海军工程大学