一种扰流元件对换热器传热性能影响探究

Study on the Influence of a Spoiler Element on Heat Transfer Performance of Heat Exchanger

扰流元件可插在换热管内,适用于各种工况,如空分装置、石油行业炼化、制冷工程等领域。采用FLUENT软件的标准湍流模型对换热器进行三维数值模拟仿真,对比研究了换热管内插扰流元件后,随着中心直径改变,流场内温度场、速度矢量场以及压力场的变化。随着扰流元件中心直径的增大,冷流压降变化不大,热流压降随中心直径增大而减小。直径为3 mm时压降最高,为35752.2 Pa;直径为6 mm时压降最低,为18443.4 Pa,相比于无管内扰流元件时,中心直径为4 mm时换热量最高,为413.97 kW,换热量增加了144%。

The spoiler element can be inserted into the heat exchanger tube,suitable for various working conditions,such as air separation unit,refinery in petroleum industry,refrigeration engineering and other fields.In this paper,the standard turbulence model of FLUENT software was used to simulate the three-dimensional numerical simulation of the heat exchanger.The changes of temperature field,velocity vector field and pressure field in the heat exchange tube with the change of center diameter were compared.With the increase of the center diameter of the spoiler,the cold flow pressure drop changes little,while the heat flow pressure drop decreases with the increase of the center diameter.The maximum pressure drop is 35752.2 Pa,when the diameter is 3 mm.The lowest pressure drop is 18443.4 Pa when the diameter is 6 mm,and the highest heat transfer amount is 413.97 kW when the center diameter is 4 mm,and the heat transfer amount increases by 144%.