HYDROGEN AUTOIGNITION IN A TURBULENT DUCT FLOW: EXPERIMENTS AND

This paper presents experimental data on the autoignition of hydrogen jets in a turbulent co-flow of hot air and associated modelling using the Conditional Moment Closure. The aim is to understand better how turbulence affects autoignition of non-premixed flows and to validate modelling approaches. It is demonstrated that the turbulent mixing causes randomness in the ignition location, that it can delay the onset of autoignition and that the autoignition time has a higher sensitivity to temperature than that expected in homogeneous mixtures. The CMC method successfully reproduces the measured autoignition times