Doctoral Dissertations
Keywords and Phrases
Large Eddy Simulation (LES); Methane explosion; Premixed combustion; Scaling effect
Abstract
"This research seeks to improve the prediction efficiency of gaseous explosions realized by numerical simulations in a full-scale underground network using a decoupled method. To provide quick predictions of overpressure distribution of methane explosions in underground airway networks, a two-section theory is employed. The explosion space is divided into a driver section and a blast-wave section. Governing equations including conservation of mass, momentum, and energy, together with chemical reaction and turbulence models are solved for the driver and the blast-wave sections using computational fluid dynamics (CFD) solver ANSYS Fluent (3D-based) and Flowmaster (1D-based) respectively. The three dimensional (3D) and one dimensional (1D) numerical analyses are preceded separately (decoupled). In the driver section, the numerical calculation results with three variables (FLSF, HDSF, and concentration) considering the size of explosion space and methane concentration level for the driver section are stored in a database tool Microsoft SQL Server Express aims to generate a methane explosion source database. To validate the selected combustion and turbulent models, a series of lab-scale methane explosion experiments were conducted. In the blast-wave section, the influences of geometric changes are quantified by using 2D Euler equations, whereas the simulation results are used to adjust the 1D network-based modeling. The decoupled method is applied in two case studies and proved capable to predict the pressure distribution of methane explosions that occurs in a complex airway network."--Abstract, page iii.
Advisor(s)
Tien, Jerry C.
Aouad, Nassib
Committee Member(s)
Awuah-Offei, Kwame, 1975-
Baird, Jason, 1955-
Ge, Mao Chen
Jiang, Deyi
Department(s)
Mining Engineering
Degree Name
Ph. D. in Mining Engineering
Publisher
Missouri University of Science and Technology
Publication Date
Spring 2015
Pagination
xiv, 195 pages
Note about bibliography
Includes bibliographic references (pages 189-194).
Rights
© 2015 Liang Wang, All rights reserved.
Document Type
Dissertation - Open Access
File Type
text
Language
English
Subject Headings
Mine explosions -- Mathematical modelsMine explosions -- Computer simulationMethaneCombustion -- Research
Thesis Number
T 10729
Electronic OCLC #
913410917
Recommended Citation
Wang, Liang, "Numerical study on scaling effects and decoupled network-based simulation of gaseous explosion" (2015). Doctoral Dissertations. 2398.
https://scholarsmine.mst.edu/doctoral_dissertations/2398