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首页> 外文期刊>International Journal of Heat and Mass Transfer >Forced convection from a rotationally oscillating cylinder placed in a uniform stream
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Forced convection from a rotationally oscillating cylinder placed in a uniform stream

机译：来自旋转振荡圆柱体的强制对流置于均匀流中

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摘要

Forced convection from a heated cylinder performing rotational oscillation about its own axis and placed in a uniform stream is investigated. The governing equations of motion and energy are solved numerically to determine the flow field characteristics and the heat transfer coefficients. The main dominating parameters are Reynolds numbers, Re, Prandtl number, Pr, amplitude of oscillation, ΘA, and the frequency ratio, FR, which represents the ratio between the frequency of oscillation, f and the natural frequency of vortex shedding, fo. The ranges considered for these parameters are 40 ≤ Re ≤200, 0≤ΘA ≤ π and 0≤ FR ≤2, while the Prandtl number is kept constant at 0.7. The lock-on phenomenon has been detected and its effect on the thermal field has been determined. The results show that the lock-on phenomenon occurs within a band of frequency near the natural frequency and the heat transfer coefficient has shown appreciable increase in the lock-on frequency range.
机译：研究了来自加热圆柱体的强制对流，该圆柱体绕其自身的轴线执行旋转振荡并置于均匀流中。对运动和能量的控制方程进行数值求解，以确定流场特性和传热系数。主要的主要参数是雷诺数Re，普朗特数Pr，振荡幅度ΘA和频率比FR，它表示振荡频率f和涡旋脱落固有频率fo之比。这些参数考虑的范围是40≤Re≤200、0≤ΘA≤π和0≤FR≤2，而Prandtl数保持恒定在0.7。已检测到锁定现象，并确定了其对热场的影响。结果表明，锁定现象发生在接近自然频率的频带内，并且传热系数显示出在锁定频率范围内明显增加。

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