Abstract
Flow and spark-ignited combustion process of a high-speed unsteady hydrogen jet is investigated using incompressible-flow type CFD with k-ε turbulence model and flamelet concept. The pseudo-nozzle concept is applied to the inlet condition with large pressure gradient. The flame propagation process is described using the flame area evolution (FAE) model. The result shows that the incylinder pressure and flame propagation process are successfully described for experimental data. Furthermore, the flame propagation process in a jet is investigated. In addition, effects of ignition timing and igniting position on combustion process are also examined.
