Numerical Simulation Of Pulverized Coal Rich/Lean Burner In Gas-Particle Multiphase Flow

The present dissertation introduces detailed summary and evaluation of the international and domestic works on the gas-solid multiphase flow in pulverized coal burner. Numerical simulation on the gas-solid multiphase flow in new type pulverized coal impact rich/lean burner is presented in it. Under the guidance of the theory of Computer Aid Test (CAT), the dissertation uses particle-particle random impact model and the Fluctuating-Spectrum-Random-Trajectory (FSRT) model to simulate the gas phase flow and the particle phase flow based on the Lagrange approach, compared with experimental results, and reaches satisfied efforts.The multiphase flow in the pulverized coal impact rich/lean burner is invested comprehensively by numerical simulation, and summarizes experiential formulas of application value. The influence of inflow velocity, the baffle body height and the clapboard position on the flow velocity, flow equilibrium between the two sides of the clapboard, particle distribution, rich/lean concentration ratio and flow resistance characteristic are studied numerically. Besides, the hydrokinetics mechanism of the inner burner flow is analyzed.The dissertation also attempts to compute the inner combustor with its jet flow together. Combined with experimental results, it analyses the characteristics of the multiphase flow to the jets, especially different baffle body height, nozzle type and particle diameter.