HAL-INERIS
Not a member yet
8807 research outputs found
Sort by
Air quality - Performance evaluation of air quality sensor systems - Part 1: Gaseous pollutants in ambient air
No full textparticipation au groupe de travail européen CEN WG42 concepteur de la norme européenne + validation de la traduction en français du document original anglaisDocument spécifiant les principes généraux, y compris les modes opératoires d'essai et les exigences, pour la classification des performances des systèmes capteurs à faible coût dans le cadre de la surveillance des composés gazeux dans l'air ambiant sur des sites fixes. La classification des systèmes capteurs comprend des essais réalisés dans des conditions prescrites en laboratoire et sur le terrain
Phytotechnologies, mobilisation sur les travaux nationaux pour élaborer des indicateurs de performance
No full textNational audienc
Risk assessment of open pit lake using in situ observations and advanced numerical modelling – application on Most Lake
No full textInternational audienc
Utilisation d'un géosynthétique à double raideur pour le renforcement des remblais cohésifs sur cavités
No full textNational audienceThe results of an experimental campaign of reinforcement of thin cohesive soil embankments in the case of cavity collapse are presented in this paper. In particular, the aim is to test the effectiveness of a new type of double stiffness geosynthetic. A coupled DEM-FEM numerical model is validated based on these results and allows a better understanding of the soil-geosynthetic interaction phenomena mobilized during the collapse. Comparisons between the numerical and experimental results obtained with the two types of reinforcement (mono-stiffness and inverted bi-stiffness) make it possible to underline the interest of the innovative product developed.Les résultats d’une campagne expérimentale de renforcement de remblais en sol cohésif de faible épaisseur dans le cas d’effondrement de cavités sont présentés dans cette communication. Il s’agit en particulier de tester l’efficacité d’un nouveau type de géosynthétique à double raideur. Un modèle numérique couplé DEM-FEM d’un sol renforcé par un géosynthétique est validé sur la base de ces résultats et permet une meilleure compréhension des phénomènes d’interaction sol-géosynthétique mobilisés lors de l’effondrement. Des comparaisons entre les résultats numériques et expérimentaux obtenus avec les deux types de renfort (mono-raideur et bi-raideur inversée) permettent de souligner l’intérêt du produit innovant développé
Induced seismicity related to first circulation tests (2018-2019) at the Balmatt geothermal doublet (Belgium)
No full textInternational audienc
Evaluer les dangers des matières qui polymérisent par méthodes expérimentales et chimie théorique
No full textNational audienc
The role of vapor fraction in hydrocarbon mist explosion
No full textInternational audienceThe modern world depends greatly on hydrocarbons which are ubiquitous, indispensable fuels used in nearly every existing industry. Although important, their use may trigger dangerous incidents, whether in their production, handling, storage, or transporting phase, especially when aerosolized. In light of proposing a standard procedure to assess the flammability and explosivity of fuel mists, a new test method was established based on the EN 14034 standard. For the previous purposes, a gravity-fed mist generation system was designed and employed in a modified 20 L explosion vessel. This test method allowed the determination of the ignition sensitivity of several fuels. In addition, their explosion severity was represented by the explosion overpressure Pm, and the rate of pressure rise dP/dtm, two thermo-kinetic parameters determined with a specifically developed control system and custom software. Nonetheless, a noticeable difference in the ignition sensitivity and the explosion severity was perceived when changing suppliers or petroleum cuts of some fuels. Moreover,sensitivity studies showed that both the droplet size distribution and the temperature of the droplets play a significant role in fuel mist explosion. These parameters can be directly related to the vapor fraction surrounding a droplet during its ignition. Consequently, this study focuses on the influence of varying the composition of three well-known and abundantly used fuels. Different petroleum cuts were introduced in different fractions into isooctane, Jet A1 aviation fuel, and diesel fuel mixtures which were then aerosolized into a uniformly distributed turbulent mist cloud and ignited using spark ignitors of 100 J. Subsequently, the same tests were executed in a vertical flame propagation tube coupled with a high-speed video camera allowing the visualization of the flame and the determination of the spatial flame velocity, and estimation of the laminar burning velocity. The latter was also estimated from the pressure-time evolution in the 20 L sphere using existing correlations. Indeed, thedetermination of the laminar burning velocity can be useful in modeling such accidents. Finally, highlighting the essential role of the mist and vapor fraction during their ignition has led to a better understanding of their explosion mechanisms
Experimental and numerical study of the fuel effect on flame propagation in long open tubes
No full textInternational audienc
