Energosberegayushchaya intensifikatsiya teploobmena rassecheniem dlinnykh gladkikh kanalov plastinchatorebristykh poverkhnostey

Testing of platefinned surfaces with interrupted rectangular channels allowed defining the range of the change of current estimations values of a rational enhancement of the convective heat exchange (RECH) Qi = 2,11…2,15...2,78 in the range of the values of criterion Rei = 600…1000...4400 and fin thickness ratio (/d)i = 0,071 … 0,083 ... 0,061. The experiment proved the rationality of the energy saving management of channels operation under conditions of the initial zone of hydrodynamic and thermal stabilization of the flow along with the scale control (/d - variable) of generable vortexes in the thin wall layer at weak diffusion towards the flow core that provided a high increase of the heat transfer coefficient at a moderate increase of aerodynamic resistance. A maximal value of RECH estimation 2,78 at Re = 4400 and (/d) = 0.061 was defined. The results of researches were analyzed in terms of physical mechanisms of the RECH process. Keywords: highdrag fin frontal profile; wall layer; flow core; parameters - fin thickness ratio, degree of channel section narrowing; vortex zone of separation; zone of reattachment.

плохообтекаемый лобовой профиль ребра, пристеночный слой, ядро потока, параметры - относительная толщина ребра, степень сужения сечения канала, вихревая область отрыва, область присоединения