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Comparative studies of three-dimensional spatially-developing supersonic turbulent spray reactive and non-reactive flows have been conducted by direct numerical simulations. The gas-droplet flow system has been captured with the hybrid Eulerian–Lagrangian approach. High-resolution bandwidth-optimized weighted essentially non-oscillatory (WENO) scheme of spatial discretization and total variation diminishing...
Direct numerical simulation (DNS) of heptane reacting sprays in a slab region is performed to investigate the effects of turbulence and droplet size on the evolutions of spray combustion. The gas phase is simulated using an Eulerian approach; while the droplets are treated with a Lagrangian method. The coupling between the two phases is considered. It is shown that the mean normalized squared droplet...
New flamelet equations for spray combustion considering evaporation effects are derived in the mixture fraction space based on the instantaneous Eulerian transport equations for gas phase and Lagrangian descriptions for droplets. The novelty of these equations lies in some source terms related to evaporation which were neglected in previous studies. The influences of spray evaporation on flamelet...
Direct numerical simulation (DNS) is used to study spray combustion in a slab layer configuration. The gas phase is simulated in an Eulerian way, while the droplets are tracked with a Lagrangian method. The coupling between the two phases is considered. A fourth-order explicit Runge–Kutta method for time integration and an eighth-order central differencing scheme for spatial discretization are used...
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