CAJ | 학술논문

借助CFD软件对3种不同类型的翅片管式换热器（平直翅片、均匀波纹翅片和倾角渐增波纹翅片）的流动传热性能进行了三维数值模拟计算，得出了在不同入口风速下各流域中心面的温度场、压力场和速度场分布图，计算出各翅片表面在不同风速下的平均传热系数和阻力系数，并与相关实验数据对比，证明该数值模拟的正确性．研究结果表明，倾角渐增波纹翅片的平均努谢尔数比平直翅片的高13．8％～29．3％，比均匀波纹翅片的高5．5％～10．3％，其强化传热效果显著．
차조CFD연건대3충불동류형적시편관식환열기（평직시편、균균파문시편화경각점증파문시편）적류동전열성능진행료삼유수치모의계산，득출료재불동입구풍속하각류역중심면적온도장、압력장화속도장분포도，계산출각시편표면재불동풍속하적평균전열계수화조력계수，병여상관실험수거대비，증명해수치모의적정학성．연구결과표명，경각점증파문시편적평균노사이수비평직시편적고13．8％～29．3％，비균균파문시편적고5．5％～10．3％，기강화전열효과현저．
Theperformanceofflowandheattransferofthreekindsoffinandtubeheatexchangers including plane fin,average pitch wave-fin and increasing pitch wave-fin heat exchangers were numerically simulated with CFD software,and the distributions of temperature,pressure and velocity on each central plane of fluid region were obtained.In addition,the mean surface heat transfer coefficient and resistance coefficientoffinweremeasuredunderdifferentwindvelocity.Thenumericalresultswereprovedtobe correct by the available experimental data.The study indicates that Nu number of the increasing pitch wave-fin is 13.8%~29.3%higher than the plane fin,and 5.5%~10.3%higher than the average pitch wave-fin,thus achieving remarkable heat transfer enhancement.