Far-field pressure prediction of a vented gas explosion from storage tanks by using new CFD simulation guidance
MetadataShow full item record
© 2018 Institution of Chemical Engineers 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 concentrations were conducted. The recorded internal and external pressures from the tests were compared with the predictions from the Multi-Energy Method (MEM) model and Baker–Strehlow–Tang (BST) model. The limitations of these two empirical models in predicting the vented gas explosion pressures are discussed. Compared to the empirical model predictions, a combined CFD modelling approach (FLACS simulation plus ANSYS Fluent simulation) yields respectable accuracy in far-field overpressure prediction. The flame speed and initial mechanical energy, which are incorrectly assumed in the MEM and BST models, are taken into account in this study. Furthermore, this study simplifies previous work by using FLACS simulations for internal pressure estimation and a newly derived correlation for far-field pressure estimation. In addition to the peak pressure estimation, the equations to calculate the pressure-time history duration and shape are proposed. Computational efficiency and prediction accuracy are both achieved in the proposed approach for far-field overpressure predictions.
Showing items related by title, author, creator and subject.
Internal and external pressure prediction of vented gas explosion in large rooms by using analytical and CFD methodsLi, J.; Hao, Hong (2017)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 ...
Experimental and numerical study of unreinforced clay brick masonry walls subjected to vented gas explosionsLi, Zhan; Chen, L.; Fang, Q.; Hao, Hong; Zhang, Y.; Xiang, H.; Chen, Wensu; Yang, S.; Bao, Q. (2017)A total of 16 full-scale in-situ tests were carried out to investigate the performances of unreinforced clay brick masonry walls subjected to vented gas explosions. The pressure-time histories of vented gas explosions, ...
Rajiwate, Farhan Liyakat Husain (2011)In the process industry, upset conditions can result in the release of fluids to the atmosphere. Such a release process is known as ‘Blowdown’. Accurate modeling and prediction of the blowdown process is important in ...