论文标题
单相矩形耦合的自然循环回路系统采用傅立叶串联的1-D模型的稳定性分析
Stability analysis of a single-phase rectangular Coupled Natural Circulation Loop system employing a Fourier series based 1-D model
论文作者
论文摘要
单相耦合的自然循环回路（CNCL）的线性稳定性分析是使用基于傅立叶系列的1-D模型进行的。进行了3-D CFD研究，以评估1-D模型捕获CNCL系统表现出的非周期性振荡行为的能力。模型验证后，系统的稳定图将从稳态的特征值获得。 CNCL具有多个稳态，并提出了一致观察到的稳态的稳定图。进行了详尽的参数研究，以观察非二维数量对CNCL系统的影响。傅立叶数和流动性系数的增加导致稳定结构域的增加。线性稳定图与经验稳定图的比较表明，非线性项不会显着影响稳定性边界。
A linear stability analysis of a single-phase Coupled Natural Circulation Loop (CNCL) is carried out using a Fourier series based 1-D model. A 3-D CFD study is undertaken to assess the ability of the 1-D model to capture the non-periodic oscillatory behaviour exhibited by the CNCL system. After the model verification, the stability maps of the system are obtained from the eigenvalues of the steady-state. The CNCL has multiple steady states and the stability maps of consistently observed steady states are presented. A thorough parametric study is conducted to observe the influence of non-dimensional numbers on the CNCL system. Increase in the Fourier number and flow resistance coefficient lead to an increase in the domain of stability. A comparison of the linear stability map with the empirical stability map indicates that the non-linear terms do not significantly affect the stability boundary.
