重点分析了圆管与扁管管间距、肋片厚度对肋效率的影响。
Emphasis is laid on the effect of tube distance and fin thickness on fin efficiency.
结果表明，采用当量椭圆简化矩形翅片使肋效率偏高，增加扰流孔则导致肋效率下降。
It shows that the calculation by applying equivalent ellipse will produce a value of fin efficiency on the high side and the fin efficiency decreases with the increase of disturbing flow holes.
同时，用等步长优化方法对管间距进行优化设计，确定了最佳肋效率时顺排扁管和错排扁管的管间距。
The Design Optimization is completed by using equal step method, the tube distances of best fin efficiency are obtained.
采用有限差分数值分析方法，应用温度逐次更新处理技术对不同扰流孔下的椭圆管矩形翅片的肋效率进行计算。
The FDM numerical analytic method is applied to calculate the fin efficiency of elliptic tube with rectangular fins on which the disturbing holes were dug by using additional source term technique.
采用三维内肋管强化传热技术，可以达到降低水套炉的金属耗量和提高热效率的目的。
The 3-D inner gilled tube strengthening heat transfer technology can be used to reduce the metal consumption and increase the thermal efficiency.
各种取热器均可用肋片强化，肋片效率一般在0．7左右。
Various types of external coolers can be strengthened by fins. In general, the fins efficiency is about 0. 7
采用高效低肋螺纹换热管，具有换热效率高、体积小、用水量小等优点；
With high efficiency and low rib thread Tube with heat transfer efficiency, small size, the advantage…
肋片的散热效率随管壁温度的升高而减小，壁温较高时安装肋片的必要性降低。
The heat rejection efficiency of the fin is decreased with the temperature of tube wall decreasing, and the necessity of fitting fin is reduced when the wall temperature is higher.
肋片的散热效率随管壁温度的升高而减小，壁温较高时安装肋片的必要性降低。
The heat rejection efficiency of the fin is decreased with the temperature of tube wall decreasing, and the necessity of fitting fin is reduced when the wall temperature is higher.
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