大涡模拟气固两相三维湍流射流

为了研究三维矩形射流中拟序结构的空间演化和颗粒扩散特征，建立了气固两相矩形射流流场内气体、颗粒两相运动的大涡模拟数学模型，并在此基础上完成了对流动雷诺数等于11 500的气固两相射流的数值模拟.采用亚网格应力模型模拟气相场,并用Lagrangian方法跟踪了颗粒相运动.模拟结果显示了流场流向涡拟序结构随时间发展的演变过程，同时给出了气流相三维拟序结构作用下微细颗粒在整个流场空间中的运动扩散特性.

Simulation of gas-solid two-phase three-dimensional turbulent jet large eddy

The large eddy simulation (LES) mathematical model for the gas and particle motion in the gas-solid two-phase rectangular jet designed and constructed in this work was used for numerical simulation at the gas-solid two-phase turbulent jet with Reynolds number of 11500. The gas phase was simulated by Sub-grid Scale model and the particles were traced by using Lagrangian method. Simulation results showed that the evolution process of the streamwise vortex structures in the flow-field increased with time; that the dispersion patterns of the small particles in the whole flow-field space were affected by the gas phase three-dimensional coherent structures. The calculated streamwise axis mean velocity, transverse velocity half-width and spanwise velocity half-width agreed well with the previous experimental results.