Revisiting unsteady shock-induced combustion with modern analysis techniques

摘要: Abstract Numerical simulations of shock-induced combustion (SIC) with detailed H 2 /O reaction mechanisms near CJ detonation velocity were investigated. The effect grid resolution and the chemical examined for unsteady SIC over a blunt body at Mach number 4.48 presented by Lehr. Using high schemes, it is found that Jachimowski mechanism, which has been used dominantly SIC, develops an unphysical low frequency amplitude oscillation resolutions. These disturbances not observed lower resolutions, while UCSD mechanism less sensitive to spatial cause was investigated Dynamic Mode Decomposition (DMD) Chemical Explosive Analysis (CEMA) technique. structure decomposed modes from DMD analysis shows shock wave moves closer projectile surface this creates disturbance increase in resolution. CEMA, influence step + OH = H O + H burned section flowfield slowly gets converted into phenomena.