Numerical Simulation Of Compressible Gas-Solid Two-phase Temprolly And Spatially Developing Mixing Layer

In this paper , numerical simulation is employed to investigate the two-dimensional compressible temporal developing and spatially developong mixing layer flow field with particles and without particle by using Euler-Lagrange two-way coupling model . The gas-field is solved by direct numerical simulation method with WNND scheme which is three-order accuracy in space , and the equations of particles are solved by biased three-point difference . Not only gas-field's influence on particles but also the reaction of particles to gas-field is considered.At first , numerical simulation are made in temporal developing gas-phase mixing layer where the convective mach number (Mc) is in the region of subsonic (0.5) , the problem of the computation field contains more numbers of initial perturbation is researched , the different development in six period problem and seven period problem is studied . And the effect of nonuniform seeding on the dispersion of heavy particles has been investigated in the flow field which contains one initial perturbation period .In spatially developing mixing layer , while the Mc is 0.5 , the different structure of flow field is obtained by adding different perturbation at inlet , and the interaction of gas-phase flow field and particle is analysed , the influence of Stokes number , particle's size, particle's relative density to gas and particle's volumn thickness is mainly investegated where the sub harmonic perturbation is added at inlet ; while the Mc is 0.8 , the influence of Stokes number , particle's size, particle's density and particle's thickness to gas on shock let structure in flow field is discussed . The influenc of turbulent to spatially developing mixing layer with particle and without particle is studied by solving turbulence model equations.