论文标题
基于傅立叶系列的倾斜闭环浮力驱动热交换器的动力学建模，具有共轭效果
Fourier series based modeling of the dynamics of inclined closed loop buoyancy driven heat exchangers with conjugate effect
论文作者
论文摘要
当前研究中介绍了倾斜的闭环浮力驱动热交换器的动力学建模，包括在热交换器处纳入壁传导效果。耦合的自然循环环（CNCL）是研究闭环浮力驱动热交换器的理想系统。该建模利用基于傅立叶系列的方法来开发1-D模型，然后通过对各个情况的3-D CFD研究进行验证。与3-D CFD数据一起观察到了良好的一致性，该数据证明了1-D模型对瞬态行为预测的适用性。确定了控制CNCL动力学并进行适当的参数研究的非二维数量和热耦合灵敏度系数。结果表明，壁的传导和倾斜度对CNCL系统的瞬态行为有重大影响。观察到随着结合CNCL系统倾斜的变化，传热系数的跳跃。 1-D模型还能够随着共轭CNCL系统的变化而捕获流动逆转，以零流场初始条件。
The modelling of the dynamics of inclined closed loop buoyancy driven heat exchangers with inclusion of the wall conduction effect at the heat exchanger is presented in the current study. A Coupled Natural Circulation Loop (CNCL) is an ideal system for studying the closed loop buoyancy driven heat exchanger. The modelling utilises a Fourier series based approach to develop a 1-D model which is then verified with the 3-D CFD studies of the respective cases. A good agreement is observed with the 3-D CFD data, which demonstrates the suitability of the 1-D model for transient behaviour prediction. The non-dimensional numbers and thermal coupling sensitivity coefficients which govern the dynamics of the CNCL are identified and an appropriate parametric study is conducted. Results show that the wall conduction and inclination have a significant effect on the transient behaviour of the CNCL system. A jump in the heat transfer coefficient with variation in the inclination of the Conjugate CNCL system is observed. The 1-D model is also able to capture the flow direction reversal with change in the inclination of the Conjugate CNCL system for zero flow field initial conditions.
