Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/23756
Title: Numerical study of large-scale LNG vapour cloud explosion in an unconfined space
Authors: Mishra S.
Mishra, Kirti Bhushan
Published in: Process Safety and Environmental Protection
Abstract: Present work aims to predict the explosion characteristics of LNG (Liquefied Natural Gas)-air clouds in a model receiving terminal. Due to the limitations in integral/phenomenological models to include the higher cloud density effects, different terrain, obstacles and wind conditions correctly, advanced 3D CFD (Computational Fluid Dynamics) based techniques are used to model different scenarios of LNG releases. Validation against the similar experiments proved the ability of CFD code to reproduce the results with reasonable accuracy. Simulations revealed that introducing atmospheric boundary layer confines the LNG cloud with a higher level of concentrated vapour densities. The predicted flame speed in LNG-air mixture is found to be almost 35 % higher than that of a corresponding LPG (Liquefied Petroleum Gas)-air mixture leading to a higher explosion overpressure. In all considered worst-cases it is found that the predicted explosion overpressure was above 3 bar and a high value of parameter DPDX (Spatial pressure gradient) was indicating the high likelihood of occurrence of DDT (Deflagration to detonation transition). The outcome of such a detailed study on the occurrence of DDT in an LNG plant is beneficial for setting the gas detectors layout, land-use planning and mitigation measures. © 2021 Institution of Chemical Engineers
Citation: Process Safety and Environmental Protection, 149: 967-976
URI: https://doi.org/10.1016/j.psep.2021.03.034
http://repository.iitr.ac.in/handle/123456789/23756
Issue Date: 2021
Publisher: Institution of Chemical Engineers
Keywords: DDT
Dispersion
Explosion
LNG-air cloud
LPG-air cloud
Overpressure
ISSN: 9575820
Author Scopus IDs: 57213026452
29467697800
Author Affiliations: Mishra, S., Technological Risk Research and Analysis Group (TRAG), Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Mishra, K.B., Technological Risk Research and Analysis Group (TRAG), Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Corresponding Author: Mishra, S.; Technological Risk Research and Analysis Group (TRAG), India; email: mishra.saumitra13@gmail.com
Appears in Collections:Journal Publications [ME]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.