南通大学学报（自然科学版）2017，Vol.16Issue(4)：28-33,47,7.
过渡流下近壁插入双圆柱对壁面传热特性的影响
Effect of the Gap Ratio on Heat Transfer Characteristics in Transitional Flow at Two-tandem Cylinders near Wall
摘要
Abstract
In order to investigate the effect of the gap ratio on heat transfer characteristics in transitional flow,a simulation model that two-tandem cylinders insert near the wall was established by using Fortran programmer.The governing equations including continuous equation,unsteady Navier-stokes equation and energy equation are solved by using the finite volume method.The results show that there are two peaks in the curves of Nusselt.The first peak is caused by the fluid acceleration between the down-wall and the upstream circular cylinder.With the increase of the gap ratio,the acceleration of the fluid decreases,and the value of the peak decreases.The second peak is caused by the fluid acceleration and the wake washing effect of the upstream circular cylinder.There exists the best position where the strength of the washing effect and the acceleration reach to the peak value with the increase of the gap ratio.It is concluded that in the case of Re =200 and P,=4D,there is an optimum insert position of two-tandem circular cylinders near wall,which can enhance the heat transfer.关键词
近壁/过渡流/有限体积法/间隙比/热传递Key words
near wall/transitional flow/finite volume method/gap ratio/heat transfer分类
能源科技引用本文复制引用
周磊,史晔,失尾匡永,喜冠南..过渡流下近壁插入双圆柱对壁面传热特性的影响[J].南通大学学报（自然科学版）,2017,16(4):28-33,47,7.基金项目
国家自然科学基金项目(51476080) （51476080）
