Venting of 22.5% hydrogen–air deflagration initiated at the rear wall of the enclosure by five ignitors into the partially confined space simulating a ‘lane’ resulted in DDT. At 54.61 ms after ignition, the DDT occurred in the ‘lane’ at the ground level, after the accelerated flame ...
An additional congested volume geometry mitigation approach is to minimize the flame travel distance at which lateral venting becomes effective. (i.e., the minimum distance to free vent). Several simplified VCE blast load prediction methods consider flame travel distance within a congested volume as ...
Large-scale testing on DDT in hydrogen−air mixtures was conducted in the FLAME facility (“Flame Acceleration Measurements and Experiments”), a 30.5-m long, 2.44-m high, and 1.83-m wide rectangular channel with a closed ignition end and an open far end and with venting/obstruction possibil...
Unfortunately, available knowledgedoes not answer the main question: what is the maximumvalue of the inertia limit for a vent cover, and how doesthis limit depend on the design application?To clarify the physics of the phenomenon and unify ...
Flame propagation velocity was independent upon ignition energy in the investigated energy range ( J or pyrotechnical charge). The resulting flames propagated in almost hemispherical form with a developed structure. The maximum visible flame velocity occurs between the original radius of the balloon R ...
explosion ventingVent sizing methods offered in current technical standards are based on empirical correlations and treat gaseous and dust applications separately. Empirical correlations are problematic for cases where the design input parameters are outside the range of experimental data. In principle, ...
Mitigation through ignition and venting prevents potential detonation situations, but the resulting deflagration burn can still pose a threat to containment structures. The purpose of this research is to understand the general behaviour of vented deflagration using simulation. This paper discusses simulation...
venting devices such as calcium silicate board and hinged light sheet steel,the internal overpressure couldn't decrease immediately when internal overpressure reached the static activation overpressure.The movement of inertial venting devices should be considered in vent design.The peak value of dynamic ...
Numerical investigation on explosion hazards of lithium-ion battery vented gases and deflagration venting design in containerized energy storage system 2023, Fuel Citation Excerpt : It is because the higher ignition position was closer to the top vent panels, and the combustion pressure wave reached ...
Simple design examples illustrate the use of this and a similar development for the sonic venting case. The basis of explosion suppression is presented, and the general design principles for a suppression system are explained with exemples of their application. Explosion isolation, deflagration ...