Influencing Factors of Methane/Moist-air Laminar Boundary Layer in Micro-channel

Abstract

Aiming at the flow characteristics of methane/moist-air laminar boundary layer in the millimeter micro channels, this paper solved the governing equation by Matlab programming and researched two kinds of micro channels’ boundary layer properties under three different conditions.The two micro channels are micro plate and micro circular tube,the spacing between two plates and the diameter of the circular tube are both 1mm,with the length both 40mm. The influences of air/carbon mole ratio, water /carbon mole ratio,air mass flow and the wall friction on the velocity characteristic of boundary layer as well as the boundary layer thickness under different working conditions were analyzed. Preliminary get that the boundary layer thickness of micro channels is up to micron magnitude,which lays a foundation for the further study of the methane/moist-air combustion and methane/moist-air stagnation flow characteristics in micro channels.