In the present study, a cylindrical superheater for producing high-temperature superheated steam was installed in a furnace, and its heat flow characteristics were investigated. The effect of applying circular fins of various curvature angles to the inside of the superheater was analyzed to improve heat transfer performance. The steam flowing into the cylindrical superheater showed a swirling flow along the wall surface as it fell down to the bottom of the superheater, and received heat from the high-temperature combustion gas. When the numerical analysis data was compared to experimental results for verification, the hot gas temperature and superheated steam temperature were found to be similar, within 5% and 8.3%, respectively. The temperature of the steam discharged through the superheater outlet was higher when fins were applied to the superheater, compared to the case without the fins, because the heat transfer area was increased and a secondary flow was generated between the fins. As a result, compared to the superheater without fins, the pressure drop increased by 2.2% with flat fins, 2.8% with 30° fins, and 3.8% with 60° fins. The discharge steam temperature increased by 0.5% with flat fins, 1.8% with 30° fins, and 2.4% with 60° fins. Also, Nusselt numbers increased by 19.6% for the flat fins, 20.3% at 30° fins, and 21.5% at 60° fins.

在本研究中，将用于产生高温过热蒸汽的圆筒形过热器安装在炉中，并研究了其热流特性。分析了将不同曲率角的圆形散热片施加到过热器内部的效果，以改善传热性能。流入圆柱形过热器的蒸汽在下降到过热器底部时沿壁表面显示出涡流，并从高温燃烧气体中吸收热量。将数值分析数据与实验结果进行比较以进行验证时，发现热气温度和过热蒸汽温度相似，分别在5％和8.3％之内。与没有翅片的情况相比，当将翅片施加到过热器时，通过过热器出口排出的蒸汽的温度更高，这是因为传热面积增加并且在翅片之间产生二次流。结果，与没有翅片的过热器相比，扁平翅片的压降增加了2.2％，30°翅片的压降增加了2.8％，60°翅片的压降增加了3.8％。扁平翅片的排汽温度提高了0.5％，30°翅片的排汽温度提高了1.8％，而60°翅片的排汽温度提高了2.4％。同样，扁鳍的Nusselt数量增加了19.6％，30°鳍的Nusselt数量增加了20.3％，而60°鳍的Nusselt数量增加了21.5％。扁平鳍片为2％，30°鳍片为2.8％，60°鳍片为3.8％。扁平翅片的排汽温度提高了0.5％，30°翅片的排汽温度提高了1.8％，而60°翅片的排汽温度提高了2.4％。同样，扁鳍的Nusselt数量增加了19.6％，30°鳍的Nusselt数量增加了20.3％，而60°鳍的Nusselt数量增加了21.5％。扁平鳍片为2％，30°鳍片为2.8％，60°鳍片为3.8％。扁平翅片的排汽温度提高了0.5％，30°翅片的排汽温度提高了1.8％，而60°翅片的排汽温度提高了2.4％。同样，扁鳍的Nusselt数量增加了19.6％，30°鳍的Nusselt数量增加了20.3％，而60°鳍的Nusselt数量增加了21.5％。