Теплообмен и гидродинамическое сопротивление при поперечном обтекании воздухом первого ряда пучка труб со сферическими углублениями
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НТУ "ХПИ"
Abstract
Создана экспериментальная установка и проведены тестовые исследования. Проведены
экспериментальные исследования среднего теплообмена и гидродинамического сопротивления при обтекании пучков труб со сферическими углублениями на поверхности. На первом этапе изучен средний теплообмен и гидродинамическое сопротивление для первого ряда шахматного пучка. Получены коэффициенты теплоотдачи и коэффициенты гидродинамического сопротивления (число Эйлера) для первого ряда пучка круглых труб с углублениями при поперечном обтекании.
Recently different methods of the profiling of oval, elliptic, drop-like, flat-&-oval and other pipes have widely been used for the external intensification of the heat exchange including those used for the creation of artificial roughness (ribs, lugs, sand roughness, etc). This paper gives consideration to the design of spherical cavities on the tube surface. For this purpose we designed the experimental bench and carried out test studies. The experimental investigations of the average heat exchange and hydrodynamic resistance that occur during streamline of the bundle of tubes with spherical cavities on the surface were carried out. Heat emission coefficients and hydrodynamic resistance (Euler number) coefficients were obtained for the first row of the bundle of circular tubes with cavities for the transverse streamline.
Recently different methods of the profiling of oval, elliptic, drop-like, flat-&-oval and other pipes have widely been used for the external intensification of the heat exchange including those used for the creation of artificial roughness (ribs, lugs, sand roughness, etc). This paper gives consideration to the design of spherical cavities on the tube surface. For this purpose we designed the experimental bench and carried out test studies. The experimental investigations of the average heat exchange and hydrodynamic resistance that occur during streamline of the bundle of tubes with spherical cavities on the surface were carried out. Heat emission coefficients and hydrodynamic resistance (Euler number) coefficients were obtained for the first row of the bundle of circular tubes with cavities for the transverse streamline.
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Теплообмен и гидродинамическое сопротивление при поперечном обтекании воздухом первого ряда пучка труб со сферическими углублениями / А. А. Халатов [и др.] // Вестник Нац. техн. ун-та "ХПИ" : сб. науч. тр. Темат. вып. : Энергетические и теплотехнические процессы и оборудование. – Харьков : НТУ "ХПИ". – 2015. – № 16 (1125). – С. 50-53.