HIGH TEMPERATURE HEAT TRANSFER FOR SUBSONIC DIATOMIC GASEOUS FLOWS IN TUBES

General review of main theoretical and experimental investigations in the world during XX age and especially made in Lithuanian Energy Institute by research advising of academician Algirdas Zhukauskas is presented. The main scientific problem was to ascertain the effect of temperature factor T_f/T_w on heat transfer equations during subsonic (low of cold gases (T_f) along hot wall (T_w), when T_f/T_w less 1 and during flow of hot diatomic gases along cold wall, when T_f/T_w more 1. In the first case, the effect of temperature factor in numerical equations can be determined by T_f/T_w in degree +0.25, in the second case, there is no practical effect on equations, because the degree by T_f/T_w equals ±0.