Effect of particle existence on high Reynolds number slit nozzle gas-particle two-phase jet

Three-dimensional Eulerian air velocities and Lagrangian particle trajector ies are numerically simulated to describe the effect of particle existence on a high RC number (Re=10(4)) gas-particle turbulent jet using two-way cou pling and Large Eddy Simulation in which the effects of particle existence on subgrid-scale flows are taken into account. The calculated results of ai r and particle turbulence characteristics (mean velocity distributions and turbulence intensity distributions) are in good agreement with experimental data obtained using a laser Doppler anemometer. Comparison of the instanta neous air vorticity isocontours of gas-particle and clean air jets reveals the production of vortices and eddies in both initial and transitional regi ons and the reduction of air turbulence in the developed region by the pres ence of particles. Based on the model for the effects of particle existence on subgrid-scale flow, the flow states that reduce or enhance air turbulen ce in high Re number gas-particle flow are discussed.