CFD modelling of hydrogen release, dispersion and combustion for automotive scenarios

Numerical analysis of release, dispersion and combustion of liquid hydrogen in a mock-up hydrogen refuelling station

“…The methodology is similar to that used in the Stockholm accident study (Venetsanos, Bartzis, Wurtz, & Papailiou, 2003;Venetsanos, Huld, Adams, & Bartzis, 2003) and in the numerical investigation of automotive accident scenarios (Venetsanos, Baraldi, Adams, Heggem, & Wilkening, 2008). It is based on five main stages:…”

“…The dispersion calculations provide the gas distribution that is used as the initial condition for the combustion calculations. The release, dispersion and combustion calculations have been performed using the same codes that were employed in the Stockholm accident analysis (Venetsanos, Bartzis, Wurtz, & Papailiou, 2003;Venetsanos, Huld, Adams, & Bartzis, 2003) and in the numerical investigation of automotive accident scenarios (Venetsanos, Baraldi, Adams, Heggem, & Wilkening, 2008). More specifically the ADREA-HF code (Bartzis, 1991;Wü rtz et al, 1996) has been applied for dispersion and the REAC-FLOW code (Troyer, Baraldi, Kranzlmueller, Wilkening, & Volkert, 2005;Wilkening & Huld, 1999) for combustion.…”

Dispersion and catalytic ignition of hydrogen leaks within enclosed spaces

“…Based upon the accident report, the authors created a numerical model that largely agrees with the accident consequences, estimated by predicted versus expected overpressures at various distances from the hydrogen source. In a subsequent study, Venetsanos et al [24] investigated hydrogen leakage from a hydrogen-fueled city bus in a similar configuration. Results were given for several storage pressures and leakage scenarios, and compared with results for methane leakage.…”

Evaluation of notional nozzle approaches for CFD simulations of free-shear under-expanded hydrogen jets

“…In [5] the majority of the participants used notional nozzle approaches to model a 35 MPa pressure H 2 release. In [6] a notional nozzle approach was used to model several H 2 and CH 4 releases from compressed gaseous systems at 20,35 and 70 MPa. In [7] a notional nozzle approach was used to model the release of CH 4 at pressures ranging from 0.85 to 10 barg inside a mechanically ventilated room and reported good predictions.…”