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首页> 外文期刊>International Journal of Heat and Fluid Flow >Space and energy-based turbulent scale-resolving simulations of flow in a 5×5 nuclear reactor core fuel assembly with a spacer grid
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Space and energy-based turbulent scale-resolving simulations of flow in a 5×5 nuclear reactor core fuel assembly with a spacer grid

机译：具有间隔网格的5×5核反应堆堆芯燃料组件中流动的基于空间和能量的湍流尺度分解模拟

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摘要

The partially averaged Navier-Stokes turbulence model, which is a bridging model between the Reynolds averaged Navier-Stokes model and direct numerical simulation, is capable of directly resolving the turbulent scales of interest by filtering the Navier-Stokes equation using turbulent kinetic energy and dissipation based filters. In this study, comparison is made between the partially averaged Navier-Stokes and large eddy simulation models, with emphasis on the mean flow characteristics and spatio-temporal turbulent flow structures. The results show that the partially averaged Navier-Stokes modeling produces results comparable to those of large eddy simulation when the appropriate cut-off energy filter is chosen. The test case involves simulating flows in a 5 x 5 fuel rod bundle configuration with a spacer grid at a Reynolds number of 14,000. The simulation results are compared with particle image velocimetry data obtained from the scientific literature.T
机译：部分平均的Navier-Stokes湍流模型是雷诺平均Navier-Stokes模型与直接数值模拟之间的桥梁模型，能够通过使用湍动能和耗散过滤Navier-Stokes方程来直接求解感兴趣的湍流尺度基于过滤器。在这项研究中，比较了部分平均的Navier-Stokes模型和大型涡流模拟模型，并着重于平均流量特性和时空湍流结构。结果表明，当选择适当的截止能量滤波器时，部分平均的Navier-Stokes建模产生的结果与大型涡流模拟的结果可比。测试用例涉及以雷诺数为14,000的带有隔板的5 x 5燃料棒束配置模拟流动。将仿真结果与从科学文献中获得的粒子图像测速数据进行比较。

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