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中文摘要：
引言 换热器在石油、化工、医药、冶金、电力、动力、制冷、纺织、食品等行业中占有举足轻重的地位。随着我国工业的不断发展，对能源的利用、开发和节约的要求不断提高，工业上的节能节水成为企业发展大计的一个重要组成部分，因此对高效换热器的需求也日益加强。在通常的气（汽）-液管壳式换热器中（以下简称传统换热器），液体走管程、气体走壳程，为改善气侧的换热，
英文摘要：
Heat transfer and fluid flow performance in internally finned tube with blocked core-tube was numerically investigated with the realizable k-ε turbulence model and wall function method, The working fluid was air. The numerical method was validated by comparing the calculated results with available experimental data. It was found that there existed an optimal value for the ratio of core-tube outside diameter to outer-tube inside diameter, and this optimal value decreased with the increase of air flow rate. The optimal ratio was about 0. 5-0. 625 in the range of studied parameters. Meanwhile under the condition of identical pressure, the optimal ratio was also about 0. 44-0.56. The conclusion is useful for the design of this kind of internally finned tubes.
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