Hydrogen Use in Internal Combustion Engines

At the completion of this module, the technician will understand:
• the combustive properties of hydrogen that relate to its use as a combustive fuel
• the air/fuel ratio of hydrogen fuel mixtures and how it compares to other fuels
• the types of pre-ignition problems encountered in a hydrogen internal combustion
engine and their solutions
• the type of ignition systems that may be used with hydrogen internal combustion
• crankcase ventilation issues that pertain to hydrogen use in an internal combustion
• the thermal efficiency of hydrogen internal combustion engines
• the type of emissions associated with hydrogen internal combustion engines
• the power output of hydrogen internal combustion engines
• the effect of mixing hydrogen with other hydrocarbon fuels

Hydrogen combustion

"DNS of lean hydrogen combustion withflamelet-generated manifolds ":

in this study we investigate possibilities to reduce hydrogen chemistry, while keeping the fundamental physical behavior.

This in order to be able to perform relatively cheap, large-scale DNS studies. The fundamental physical behavior of hydrogen combustion has an important role in subgrid scale modeling in LES simulations. Here flames generate wrinkles without any external hydro dynamic perturbations. In subgrid modeling this has to be taken into account.

Thus the DNS studies can guide the advancement of the LES modeling for hydrogen combustion.