Heat exchange in film condensation of stationary vapor on a vertical surface

Analysis of heat exchange in film condensation of stationary vapor on a vertical surface

“…It may be noted that the experimental data on heat exchange in the condensation of Kh-21 [15], Kh-12 [17,18], and carbon tetrachloride [19] agree well with Struve's experiments with the evaporation of Chladone-ll carried Out in the range Re 20-2000 and with approximately the same Prandtl numbers as in the experiments with condensation.…”

“…All these calculations differ noticeably from the experimental data on the condensation of Chladone-21 [15]. The model of Domanskii and Sokoiov [8] obtains much higher Nusselt numbers than other calculations, apparently because, in distinction to most other authors, friction over the section of the film was considered constantand equal to the friction with the wall.…”

“…4. Comparison of the experimental data with calculation by the suggested procedure: i) condensation of Chladone-21 [15] (Pr = 3.4; Re = 10-4250); 2) condensation of water vapor [24] (Pr = 1.75; Re = 25-1260); 3) condensation of water vapor [24] (Pr = 1.14; Re = 65-2340); 4) calculation after Nusselt; 5, 6, 7) calculation by the present authors for Pr = 3.4, 1.75, and 1.14, respectively. As regards the determination of Nusselt numbers for turbulent flow (< Nu~ >), the following must be pointed out.…”

Local heat exchange in the film condensation of a stationary vapor on a vertical surface

“…( 14) can be used for engineering calculations of heat transfer in the surface evaporation of a while Eq. (15) can serve Mean heat transfer in the film condensation of a pure stationary vapor on a vertical surface: a) Pr ~ 2; 1) data of Kutateladze; 2) Shekriladze-Ratiani; 3) Lozhkin-Kanaev; 4) Zozulya; 5) Burov; 6) Gudemchuk; 7)Strobe; 8) Gebbard; 9) Maisenburg; 10) Jacob-Erk-Eck (data on stream condensation taken from [1, 10,11,12]); 11) theoretical calculation with Eq. ( 13) at Pr = 2; 12) calculation with Eq.…”

“…( 13) at Pr = 2; 12) calculation with Eq. (15) at Pr = 2; 13) Nusselt theory with strictly laminar film flow; b) Pr ~ 3 ; data of Zozulya, steam [ 11 ]; 2) Kozitskii, Khladon 12 vapor [ 12]; 13) Mazyukevich, Khladon 12 vapor [ 12 ]; 4) Gogonin-Dorokhov-Sosunov, Khladon 21 vapor [12]; 5) Kozitskii, Khladon 22 vapor [12]; 6) theoretical calculation with Eq. ( 13) at Pr = 3; 7) calculation with Eq.…”