CORRECTING THE PREDICTIONS BY BAKER-STREHLOW-TANG (BST) MODEL FOR THE GROUND EFFECT

摘要

Simple models representing Vapour Cloud Explosions (VCEs) are widely used in risk assessment for onshore and offshore process installations. Because of their simplicity, blast loads and the risks of a large range of scenarios can be assessed quickly. The Baker-Strehlow-Tang (BST) model belongs to a group of these models using blast curves to predict the consequences of VCEs. The blast curves are usually developed based on modelling results of idealised cases and provide side-on overpressure and impulse or positive duration as a function of distance from the explosion centre. The blast curves developed for BST methodology were based on the predictions of spherical free air explosions and its predictions need to be corrected when applied for explosions near to ground. This paper presents a method to correct the predictions of the BST model and validation of this method.