Numerical Investigation of Shock-Turbulence Interactions in a Chemically Reactive Flow

Shock-Turbulence-Combustion Interactions (STCI) in a fundamental flow configuration are studied in detail by the direct numerical simulations (DNS) method. DNS computations are conducted by solving fully compressible flow equations with a high-order hybrid monotonicity-preserving compact finite-difference scheme together with a single-step chemical reaction model for a non-premixed reaction. Robustness is ensured with a damping/convective buffer zone at the end of computational domain and grid convergence plus statistical convergence tests. We explore the effects of density variations, turbulence intensity, and initial scalar length scales on the post-shock turbulence, mixing and combustion in the STCI set up. The presented work also considers the influence of an intensely exothermic reaction and a high-intensity compressible isotropic turbulence on the shock properties and its movement. Our findings offer insights into the complex interplay between turbulence, shock waves, and chemical reactions in a well-characterized fundamental flow configuration.