NUMERICAL SIMULATION OF 3-D TURBULENT RECIRCULATING GAS-PARTICLE FLOWS IN A SPOUTING COMBUSTOR

摘要

The 3-D turbulent gas-particle flow in the spouting combustor ( the lower part V of a spouting-cyclone combustor ) is simulated using a κ-ε-Ap two-phase turbulence model. The results show that: (1)the predicted results are in good agreement with the experimental ones; (2)in the spouting combustor, there is a large-size gas-particle recirculation zone and a small-size one in the x-r plane, which is favorable to burning coarse coal particles. (3) in almost every r-θ plane, there are several gas-particle vortexes, which is beneficial to the mixing, heat and mass transfer between two phases, thus, to the two-phase combustion.