热泵换热器管束在湿–热–机耦合下的大变形分析

Analysis of Large Deformation of Heat Exchanger Tube Bundles under Wet-Heat Mechanical Coupling

摘要: 研究热泵换热器管束梁在湿–热–机环境下的非线性大变形行为。首先建立了多物理场作用下的非线性大变形控制微分方程。采用数值方法分析了泡沫金属梁式换热器管束在湿–热–机载荷下非线性大变形行为。给出了不同升温和不同湿度下细长管束转角和弯矩与受力之间的关系路径曲线图。讨论了升温以及湿度变化对管束弯曲行为的影响。结果表明：随着均匀湿热和非均匀湿热的增加，管束的变形都增加；相同条件下，非均匀湿热对结构的变形影响较小。

Abstract: Study the nonlinear large deformation behavior of heat pump heat exchanger bundle beams in a humid thermal mechanical environment. Firstly, a nonlinear large deformation control differential equation under the action of multiple physical fields was established. The nonlinear large deformation behavior of foam metal beam heat exchanger tube bundles under wet-heat-mechanical loads was analyzed using numerical methods. The relationship path curves between the angle and bending moment of the slender tube bundle and the force under different heating and humidity conditions were provided. The influences of temperature rise as well as humidity changes on the bending behaviors of tube bundles were discussed. The results show that with the increase of uniform and non-uniform damp heat, the deformation of the tube bundle increases; Under the same conditions, the influence of non-uniform damp heat on the deformation of the structure is relatively small.