Exergy Analysis in Hydrogen-Air Detonation
Joint Authors
Rouboa, Abel
Silva, Valter
Couto, Nuno
Source
Journal of Applied Mathematics
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-06
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
The main goal of this paper is to analyze the exergy losses during the shock and rarefaction wave of hydrogen-air mixture.
First, detonation parameters (pressure, temperature, density, and species mass fraction) are calculated for three cases where the hydrogen mass fraction in air is 1.5%, 2.5%, and 5%.
Then, exergy efficiency is used as objective criteria of performance evaluation.
A two-dimensional computational fluid dynamic code is developed using Finite volume discretization method coupled with implicit scheme for the time discretization (Euler system equations).
A seven-species and five-step global reactions mechanism is used.
Implicit total variation diminishing (TVD) algorithm, based on Riemann solver, is solved.
The typical diagrams of exergy balances of hydrogen detonation in air are calculated for each case.
The energy balance shows a successive conversion of kinetic energy, and total enthalpy, however, does not indicate consequent losses.
On the other hand, exergy losses increase with the augment of hydrogen concentration in air.
It obtained an exergetic efficiency of 77.2%, 73.4% and 69.7% for the hydrogen concentrations of 1.5%, 2.5%, and 5%, respectively.
American Psychological Association (APA)
Rouboa, Abel& Silva, Valter& Couto, Nuno. 2012. Exergy Analysis in Hydrogen-Air Detonation. Journal of Applied Mathematics،Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-993317
Modern Language Association (MLA)
Rouboa, Abel…[et al.]. Exergy Analysis in Hydrogen-Air Detonation. Journal of Applied Mathematics No. 2012 (2012), pp.1-16.
https://search.emarefa.net/detail/BIM-993317
American Medical Association (AMA)
Rouboa, Abel& Silva, Valter& Couto, Nuno. Exergy Analysis in Hydrogen-Air Detonation. Journal of Applied Mathematics. 2012. Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-993317
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-993317