CAJ | 학술논문

对三角翼圆形翅片管换热器、三角翼等径长椭圆形翅片管换热器和三角翼等周长椭圆形翅片管换热器的流动传热性能分别进行了数值研究.结果表明：三角翼等周长椭圆形翅片管换热器温度场和速度场分布最为均匀，换热效果最好；三角翼等周长椭圆形翅片管换热器奴塞尔数（Nu）最大，比三角翼圆形翅片管换热器增大2.2%~6.1%，比三角翼等径长椭圆形翅片管换热器增大6.5%~8.3%，比平翅片管换热器增大29.1%~ 33.5%；从综合传热性能分析，三角翼纵向涡椭圆形翅片管换热器适合于中等及较大雷诺数（Re）工况.
대삼각익원형시편관환열기、삼각익등경장타원형시편관환열기화삼각익등주장타원형시편관환열기적류동전열성능분별진행료수치연구.결과표명：삼각익등주장타원형시편관환열기온도장화속도장분포최위균균，환열효과최호；삼각익등주장타원형시편관환열기노새이수（Nu）최대，비삼각익원형시편관환열기증대2.2%~6.1%，비삼각익등경장타원형시편관환열기증대6.5%~8.3%，비평시편관환열기증대29.1%~ 33.5%；종종합전열성능분석，삼각익종향와타원형시편관환열기괄합우중등급교대뢰낙수（Re）공황.
In the present study,the heat transfer and fluid flow characteristics of fin-tube heat exchangers of circular-tube,equal-diameter elliptic-tube and equal-perimeter elliptic-tube with delta winglets longitu-dinal vortex was presented based on the numerical simulation. The result showed that the temperature and velocity field of equal-perimeter elliptic-tube fin heat exchanger more uniform,and its heat transfer per-formance was the best,and the Nu number of equal-diameter elliptic-tube fin heat exchanger was the lar-gest,which was 2. 2% ~ 6. 1% higher than that of circular-tube heat exchanger with delta winglets, 6. 5% ~ 8. 3% higher than that of equal-radius elliptic-tube heat exchanger and with delta winglets and 29. 1% ~ 33. 5% higher than that of flat fin-tube heat exchanger. Considering from the overall perform-ance,the delta winglets longitudinal vortex oval fin-tube heat exchanger fit for moderate and high Reynolds numbers.