Study on Numerical Calculation Method of Wall Temperature of a Reverse-flow Combustor
The reverse-flow combustor has a complex combustion flow field structure.In order to obtain the flow,combustion characteristics and temperature distribution on the wall,based on the open-source fluid dynamics computational platform OpenFOAM,this paper developed a two-phase spray combustion and fluid-thermal-solid coupling solver to perform numerical simulation of the wall temperature of the re-verse-flow combustor,considering the heat transfer between the internal field in the combustor and the liner wall.The numerical simulation results show that the flow field,temperature field and liner wall tem-perature distribution in the combustor can be reflected accurately by the fluid-thermal-solid coupling wall temperature calculation method developed based on OpenFOAM.The high temperature areas on the liner wall of the reverse-flow combustor are mainly located near the primary holes and the middle of the dilution holes in the inner annulus,near the primary holes and dilution holes in the outer annulus,the outlet sec-tion of the large elbow as well as the outer edge of the deflector.The maximum temperature is up to 1 000 K.With the increase of fuel-air ratio,the temperature distribution characteristics of the liner wall remain consistent,but the wall temperature increases significantly.