Heat transfer enhancement and torque reduction by traveling wave-like blowing and suction in turbulent Taylor-Couette flow
Heat transfer enhancement and torque reduction by traveling wave-like blowing and suction in turbulent Taylor-Couette flow
复制标题
DOI：
10.1299/jtst.2021jtst0003
复制
发表时间：
2021
影响因子：
1.2
通讯作者：
H. Mamori;K. Fukudome;K. Ogino;N. Fukushima;M. Yamamoto
中科院分区：
文献类型：
--
作者：
H. Mamori;K. Fukudome;K. Ogino;N. Fukushima;M. Yamamoto
对湍流Taylor-Couette流动进行了直接数值模拟，以研究行波控制对扭矩和传热的影响。在Taylor-Couette流中，内、外圆柱体分别旋转和静止，且圆柱体壁之间的温差保持恒定。内筒与外筒之比为0.882，雷诺数设定为84，000。一个行波状吹吸作用于内筒壁上。参数的研究显示了控制参数对扭矩和传热的影响。我们专注于三个特征参数集：传热增强，再层化现象，并同时实现扭矩降低和传热增强。我们采用的身份方程，通过使用三分量分解，澄清平流，湍流和扩散对扭矩和斯坦顿数的贡献。结果表明，行波控制影响湍流和平流的贡献。
Direct numerical simulations of turbulent Taylor–Couette flows are performed to investigate the effect of a traveling wave control on torque and heat transfer. In the Taylor–Couette flow, inner and outer cylinders are rotating and immobile, respectively, and the temperature difference between cylinder walls is maintained as constant. The ratio between the inner and outer cylinder is 0.882, and the Reynolds number is set as 84,000. A traveling wave-like blowing and suction is imposed on an inner cylinder wall. A parametric study shows the effect of control parameters on torque and heat transfer. We focused on three characteristic parameter sets: heat transfer enhancement, relaminarization phenomenon, and simultaneous achievement of torque reduction and heat transfer enhancement. We employed identity equations by using three-component decomposition to clarify contributions from advection, turbulence, and diffusion on torque and Stanton number. The results indicated that the traveling wave control affects the turbulence and advection contributions.