套管换热器多场耦合动态响应数值模拟

Numerical Simulation of Multi-field Coupling Dynamic Response for Double-pipe Heat Exchanger

将管壳程流体与换热管相结合,阐述了套管换热器耦合界面物理量传递关系、多场耦合关键问题和计算流程,建立套管换热器多场耦合数值模型,该模型涉及多物理场计算、多界面耦合和多参数迭代收敛的数值模拟,同时研究了套管换热器多场耦合动态响应。数值模拟表明:界面载荷、位移、热量、温度、传热系数和湍流频率呈现周期性响应规律,界面流体载荷具有阻止换热管加速和减速运动的特征。

The combination of pipe and shell fluid was studied,and the double-pipe heat exchanger＇ s transitive relation of coupled interface physical quantity was expounded,including the multi-field coupling matters and computational process.The numerical model of multi-field coupling for double-pipe heat exchanger was established,which involves multi-physics field calculation,multi-interface coupling and multiple parameter convergence.Both investigating and simulating multi-field dynamic response of the double-pipe heat exchanger shows that the interface load,displacement,heat,temperature,heat transfer coefficient and turbulence frequency assume a periodic response,and the interface fluid load has characteristics of preventing tubes against acceleration and deceleration motion.