Development of a Dedicated Hydrogen Combustion System for Heavy-Duty Applications

Presented by:

Vincent Giuffrida, CFD Engineer
IFP Energies nouvelles

Olivier Colin, Research Engineer
IFP Energies nouvelles

In this webinar, our collaborators at IFP Energies nouvelles will describe how they used CONVERGE to define the specifications of a dedicated hydrogen direct-injection combustion system for a heavy-duty application to maximize fuel efficiency and lower raw NOx emissions. The methodology used in the study is based on the Extended Coherent Flame Model (ECFM) with Reynolds-Averaged Navier-Stokes (RANS) turbulence modeling. The new general fuel definition for ECFM, introduced in CONVERGE 4, allowed the model to be applied to this hydrogen study. In addition, a new turbulent strain function for the flame surface density equation will be presented, which allowed the researchers to improve the model predictivity. Using the boundary conditions defined through a 0D pre-study on two specified operating points (cruise and full load), 3D simulations were conducted to optimize the H2/air mixing quality and the design of the engine. Based on this optimized engine setup, experiments were carried out on a single-cylinder test bench at IFPEN. Good efficiencies were obtained, and the trends agreed well with the results from the simulation development phase.