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首页> 外文期刊>Applied Mathematical Modelling >Forced convective flow and heat transfer past an unconfined blunt headed cylinder at different angles of incidence
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Forced convective flow and heat transfer past an unconfined blunt headed cylinder at different angles of incidence

机译：强制对流流动和热传递以不同的入射角经过无限制的钝头圆柱体

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In the present paper, a numerical investigation has been carried out to study the forced convective flow and heat transfer characteristics past a blunt-headed cylinder in crossflow. Employing air as an operating fluid, calculations are carried out for a range of Reynolds number (Re) from 40 to 160. The angle of incidence is varied in the range of 0° ≤ α ≤ 180°. The thermofluid features of flow and heat transport are analysed in detail for different angles of incidence. To analyse the aerodynamic characteristics, several parameters such as drag and lift coefficients, moment coefficient, Strouhal number, recirculation length, and local time-averaged vorticity flux have been calculated. Furthermore, a stability analysis has been undertaken by using the Stuart Landau equation to enumerate the critical Reynolds number at each angle of incidence. Heat transfer characteristics are studied by computing local and time-averaged values of Nusselt numbers. When compared to a rectangular cylinder, a blunt-headed cylinder exhibits an enhanced heat transfer rate. In the end, an entropy generation analysis has been carried out to study the effects of Re and angle of incidence on the efficiency of thermofluid transport characteristics.
机译：在本文中，已经进行了数值研究以研究在横流中经过钝头圆柱体的强迫对流和传热特性。使用空气作为工作流体，对雷诺数（Re）从40到160的范围进行了计算。入射角在0°≤α≤180°的范围内变化。详细分析了不同入射角下流动和传热的热流体特征。为了分析空气动力学特性，已经计算了一些参数，例如阻力和升力系数，力矩系数，斯特劳哈尔数，再循环长度和局部时间平均涡流。此外，已经通过使用Stuart Landau方程来枚举每个入射角的临界雷诺数来进行稳定性分析。通过计算Nusselt数的局部和时间平均值来研究传热特性。与矩形圆柱体相比，钝头圆柱体的传热速率更高。最后，进行了熵生成分析，以研究Re和入射角对热流体传输特性效率的影响。

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