一、前言由椭圆管和椭圆翅片管组成的换热器在工业上应用得越来越广泛,特别是用作大型电站的风冷器和暖风器其传热和节能效果十分显著,但对横掠气流中椭圆管和椭圆翅片管放热研究得却很少。作者曾对各种不同形状椭圆光管在横掠气流中的放热进行研究,讨论了椭 I. INTRODUCTION Heat exchangers consisting of oval tubes and oval finned tubes have become more and more widely used in industry. Especially for air-coolers and heaters used in large-scale power plants, their heat transfer and energy saving effects are remarkable, but Few studies have been made on the exothermic behavior of oval and elliptical finned tubes in swept air. The author has conducted a study of the exothermic heat transfer of various shapes of elliptical tubes in a swept swept stream,