CAJ | 학술논문

采用SIMPLE算法求解RNG k-ε方程，分析丁胞强化换热管管内流动传热情况，研究管内侧突起结构对于单相气体流动过程的强化传热性能和压力损失，并和文献中的实验值进行对比。结果表明，丁胞管管内突起虽会使突起左右两侧局部换热系数减小，但总体上是增强了换热性能，且随着 Re 的增加强化换热效果更明显。同时也因形阻力增大了流动阻力。
채용SIMPLE산법구해RNG k-ε방정，분석정포강화환열관관내류동전열정황，연구관내측돌기결구대우단상기체류동과정적강화전열성능화압력손실，병화문헌중적실험치진행대비。결과표명，정포관관내돌기수회사돌기좌우량측국부환열계수감소，단총체상시증강료환열성능，차수착 Re 적증가강화환열효과경명현。동시야인형조력증대료류동조력。
Numerical simulations were conducted to study the heat transfer performance and characteristics of pres-sure loss for the protrusions in dimpled tubes,and the results were compared with the experimental results from other essay. The results show that even though protrusion in dimpled tube lower part of the local heat transfer coefficient, the global average heat transfer coefficient has been enhanced,and with the increase of the Reynolds number,the effect of heat transfer is much clearer. At the same time,pressure drop increases due to form drag.