Numerical Simulation Of Surface Heat Flux Distribution On Furnace Wall Of A 300MW Utility Boiler

In this thesis, turbulent gas-solid two-phase flow, heat transfer and combustion in 300MW boiler furnace of Zhangjiakou power plant are simulated with the numerical simulation program based on the boiler's structure parameter and operation parameter. The wall heat flux distribution, two-phase flow field, temperature field and pulverized coal particles trajectory in furnace are described according to the calculation results. How coal-air ratio change, combustion center change and boiler load change influences the simulation results when boiler combustion adjusting are analyzed together with the boiler operation characteristics. In order to see the security and the efficient performance of the boiler 40% low load operation fully, surface heat flux distribution laws on furnace wall and its influences to water circulation are studied, combined with water dynamical calculations and experiments done on this boiler.