Improved Delayed Detached Eddy Simulation of Combustion of Hydrogen Jets in a High-Speed Confined Hot Air Cross Flow

The paper deals with the self-ignition and combustion of hydrogen jets in a high-speed transverse flow hot vitiated air duct. Improved Delayed Detached Eddy Simulation (IDDES) approach based on Shear Stress Transport (SST) model is used, which this applied to turbulent reacting finite rate chemical reactions. An original Adaptive Implicit Scheme for unsteady simulations flows combustion, was successfully used IDDES simulation, described. simulation results are compared experimental database obtained at LAERTE workbench ONERA—The French Aerospace Laboratory. Comparison shows strong sensitivity surface roughness temperature duct walls. modeling good agreement pressure distributions along wall videoregistration excited radical chemiluminescence.