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首页> 外文会议>ERCOFTAC International Symposium on Engineering Turbulence Modelling and Measurements(ETMM6); 20050523-25; Sardinia(IT) >DIRECT NUMERICAL SIMULATION OF ROTATING TURBULENT FLOWS THROUGH CONCENTRIC ANNULI
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DIRECT NUMERICAL SIMULATION OF ROTATING TURBULENT FLOWS THROUGH CONCENTRIC ANNULI

机译：通过集中圆环旋转湍流的直接数值模拟

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摘要

Rotating turbulent flows through concentric annuli with several radius ratios and rotation numbers were systematically investigated by means of direct numerical simulation (DNS). In the outer-wall rotation, the flow is stabilized as expected from an existing DNS of an axially rotating pipe flow without an inner rod. The profiles of the mean azimuthal velocity and Reynolds shear stress in the large radius ratio case are different from those in the small radius ratio case. In the inner-wall rotation, the flow is unstable near the inner rod and the mean quantities are strongly dependent on the radius ratio and rotation number. The instantaneous fluctuating structures are distributed along the inner-wall motion and become helical.
机译：通过直接数值模拟（DNS），系统地研究了流过具有多个半径比和同心圆数的同心环流的湍流。在外壁旋转中，如没有内部杆的轴向旋转的管道流的现有DNS所预期的那样，流量得以稳定。大半径比情况下的平均方位角速度和雷诺剪切应力曲线与小半径比情况下的不同。在内壁旋转中，在内杆附近的流动不稳定，平均量在很大程度上取决于半径比和转数。瞬时波动结构沿内壁运动分布并呈螺旋形。

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