To find the basic heat transfer performance of fin-tube heat exchanger, the numerical analysis is carried for heat transfer element with single round and related fin area.

用数值方法分析了涡产生器式圆管管片式换热板芯单个圆管翅片区域内的传热与阻力性能。

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A certain amount of nail head or fin within an acceptable range of tube's back side can improve the area of access to radiation.

在炉管背火侧的一定范围内增加适量的钉头或翅片，可以提高背火侧的受辐射面积。

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The results show that the j and f factors increase with the fin space and fin length decreasing, and the fin space has more obvious effect on the area of optimization factor.

试验结果表明，新型开窗翅片的翅片间距对表面传热因子和阻力性能影响较为显著。

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His organisation is campaigning for a large Marine Protected Area to be established here to protect the sharks from boat damage and fin-poaching.

BBC: Tagging whale sharks in the Maldives