Dispersion and burning behavior of hydrogen released in a full-scale residential garage in the presence and absence of conventional automobiles

Numerical study on the influence of different boundary conditions on the efficiency of hydrogen recombiners inside a car garage

“…In order to assess the impact of the hydrogen distribution, the same arrangement has been repeated for hydrogen release from below a generic car mock-up leading to a more homogeneous hydrogen distribution (M11eM13, M18). These different hydrogen distribution characteristics are in agreement with experimental findings reported by Cariteau et al [13] and Pitts et al [15].…”

“…However, a diffuse hydrogen release e.g. from underneath a car would lead to a more homogeneous distribution [13,15]. This case has been investigated by introducing an obstacle in the shape of a car to the numerical domain.…”

Numerical study of hydrogen release accidents in a residential garage

“…First, a preliminary analysis of the influence of different simulation parameters (choice of mesh treatment of turbulence) on the numerical results is proposed. Then we compare these numerical results, with experimental results of William et al [14] to validate our model choices.…”

“…The garage of William et al [14] having interior dimensions 6.1 m (width), 6.1 m (length), 3.05 m (height). Two 0.2 m  0.2 m openings in the right side wall at heights of 2.3 m provided visual access to the interior (Fig.…”

“…The forced ventilation method ventilates hydrogen within about 10 s, one side of the space is completely open, and a hydrogen buoyant plume is subjected to cross flows during forced ventilation. William Pitt et al conducted experimental studies to characterize the behavior of helium in a residential garage at a reduced scale of 1/4, the hydrogeneair mixture when it is released in a two-car residential garage [14]; they have studied the distribution of the hydrogen fraction into the garage with and without vehicle, the combustion behavior of hydrogeneair mixture resulting in damage of the garage and the vehicle. Matsuura [15] clarified the effects of the geometrical configurations of ventilation systems on leaking hydrogen dispersion and accumulation in terms of natural and forced ventilation.…”