R 55 Rifert, V. G. Evaporation heat transfer in liquid films flowing down horizontal smooth and longitudinaly profiled tubes / V. G. Rifert, Ju. V. Putilin, V. L. Podbereznyi // Journal of Enhanced Heat Transfer . - 2001. - Vol.8, №2. - С. 91-97 Рубрики: ФИЗИКА Кл.слова (ненормированные): ENHANCEMENT -- EVAPORATION -- LONGITUDINAL PROFILE Аннотация: The heat transfer mechanism of a liquid film flowing down horizontal tubes is studied by experimental determination of local and average heat transfer coefficients. A method of its enhancement is developed which is based on the break-down of the heat boundary layer by longitudinal fins and grooves. The calculated functions and recommendations on geometrical parameters of profiling, which allow heat transfer enhancement by a factor of 1.4-1.9 and overall "vapor-liquid" heat transfer by a factor of 1.3-1.5, are given |