用大涡模拟计算流致振动的流体激励力

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Large Eddy Simulation of Turbulent Buffet Forces in Flow Induced Vibration

Mechanics Laboratory for Reactor Structure, Nuclear Power Institute of China, Chengdu, 610041

摘要: 本文对湍流大涡模拟理论的脉动过滤和Smagorinsky亚格子模型进行了介绍,并用大涡模拟对秦山II期反应堆1∶5模型压力容器和吊篮的环腔内流场进行了数值模拟,计算了吊篮表面压力的时间分布和空间分布,其压力脉动的功率谱密度计算值和实验值在同一个量级内。因此,可以用计算所得的压力作为吊篮振动的激励载荷。
- 流致振动 /
- 流体激励力 /
- 大涡模拟 /
- CFX
Abstract: The pressure pulse filter and Smagorinsky subgrid stress model of the LES（Large Eddy Simulation） are introduced.The fluid field in the annular plenum between the pressure vessel and the core barrel of the Qingshan II phase model test are simulated,and the distribution of the total pressure in the space and time are obtained.The results show that the PSD（Power Spectrum Density） of LES from the calculation and the test keeps the same quantity order.Thus,the pressure of LES can be a load to stimulate the barrel vibration.
- Flow induced vibration /
- Fluid buffet /
- Large Eddy Simulation /
- CFX