Internal and external pressure prediction of vented gas explosion in large rooms by using analytical and CFD methods
MetadataShow full item record
This paper presents an analytical and a numerical method to predict the internal and external pressures from vented gas explosion in a large enclosure. The first peak internal pressure near the venting of enclosure, which is the primary factor related to the external pressure in far field, is predicted by using analytical correlations. The accuracy of the analytical method is verified by using data from a series of experiments with idealized conditions. However, the incapability of external pressure prediction and over-prediction of peak internal pressure are seen in the realistic scenario by using the analytical approach. Therefore computational Fluid Dynamics (CFD) simulations are consequently performed to accurately estimate both the internal and external pressures of vented explosions. A CFD modelling procedure is suggested in this paper to model the turbulent flame inside the enclosure by using FLACS and to calculate the blast wave propagation with low turbulence in free air by using ANSYS Fluent. This combined CFD modelling approach is proven yielding good predictions of internal and external pressures from vented explosions.
Showing items related by title, author, creator and subject.
Numerical and analytical prediction of pressure and impulse from vented gas explosion in large cylindrical tanksLi, Jingde; Hao, Hong (2019)© 2019 Institution of Chemical Engineers This paper presents an extension of previous study on estimating the internal and external pressure and impulse from vented gas explosion in large cylindrical tanks. Unlike the ...
Far-field pressure prediction of a vented gas explosion from storage tanks by using new CFD simulation guidanceLi, J.; Hao, Hong (2018)An extension of previous work to predict the far-field overpressures of vented gas explosions from small-medium scale storage tanks is presented. Four actual vented explosion experiments with different methane-air mixture ...
Experimental and computational Fluid Dynamics study of separation gap effect on gas explosion mitigation for methane storage tanksLi, J.; Hao, Hong; Shi, Y.; Fang, Q.; Li, Zhan; Chen, L. (2018)This paper presented both experimental and numerical assessments of separation gap effect on vented explosion pressure in and around the area of a tank group. A series of vented gas explosion layouts with different ...