Condensation in a tube from the aaseous mixture flow in the approximation of a boundary layer with suction

The condensation of turbulent and laminar flows of a gaseous mixture at variable physical properties in a tube with an initial section, as well as the variation of flow parameters over the channel length at two types of boundary conditions were investigated. The N2O4 reversible 2NO2 reversible 2NO + O2 system is taken as a gas mixture, where NO and O2 are incondensible components. Two cases are considered: when both reactions are ''frozen'', and when the first one proceeds in equilibrium and the second is ''frozen''. In the calculation a two-dimensional mathematical model is applied, which is based on the assumption, that a liquid film is completely sucked out through a wall, and the resistance and mass transfer at condensation are determined by the process in a gaseous boundary layer. The effect of a cross mass flow, the mixture composition and gravitation field on resistance and heat transfer is shown