Influence of smooth temperature variation on hotspot ignition
Abstract
Autoignition in thermally stratified reactive mixtures originates in localised hotspots. The ignition behaviour is often characterised using linear temperature gradients and more recently constant temperature plateaus combined with temperature gradients. Acoustic timescale characterisation of plateau regions has been successfully used to characterise the type of mechanical disturbance that will be created from a plateau core ignition. This work combines linear temperature gradients with superelliptic cores in order to more accurately account for a local temperature maximum of finite size and the smooth temperature variation contained inside realistic hotspot centres. A one-step Arrhenius reaction is used to model a H2–air reactive mixture. Using the superelliptic approach a range of behaviours for temperature distributions are investigated by varying the temperature profile between the gradient only and plateau and gradient bounding cases. Each superelliptic case is compared to a respective plateau and gradient case where simple acoustic timescale characterisation may be performed. It is shown that hot spots equivalent with excitation-to-acoustic timescale ratios sufficiently greater than unity exhibit behaviour very similar to a simple plateau-gradient model. Furthermore, for larger hot spots with timescale ratios sufficiently less than unity the reaction behaviour is highly dependent on the smooth temperature profile contained within the coremore »
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- Universities/Institutions; USDOE
- OSTI Identifier:
- 1417170
- Report Number(s):
- LA-UR-17-28265
Journal ID: ISSN 1364-7830; TRN: US1801000
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Combustion Theory and Modelling
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 1364-7830
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; hotspot; acoustic timescale; thermal stratification; temperature gradient; detonation
Citation Formats
Reinbacher, Fynn, and Regele, Jonathan David. Influence of smooth temperature variation on hotspot ignition. United States: N. p., 2017.
Web. doi:10.1080/13647830.2017.1381347.
Reinbacher, Fynn, & Regele, Jonathan David. Influence of smooth temperature variation on hotspot ignition. United States. https://doi.org/10.1080/13647830.2017.1381347
Reinbacher, Fynn, and Regele, Jonathan David. Fri .
"Influence of smooth temperature variation on hotspot ignition". United States. https://doi.org/10.1080/13647830.2017.1381347. https://www.osti.gov/servlets/purl/1417170.
@article{osti_1417170,
title = {Influence of smooth temperature variation on hotspot ignition},
author = {Reinbacher, Fynn and Regele, Jonathan David},
abstractNote = {Autoignition in thermally stratified reactive mixtures originates in localised hotspots. The ignition behaviour is often characterised using linear temperature gradients and more recently constant temperature plateaus combined with temperature gradients. Acoustic timescale characterisation of plateau regions has been successfully used to characterise the type of mechanical disturbance that will be created from a plateau core ignition. This work combines linear temperature gradients with superelliptic cores in order to more accurately account for a local temperature maximum of finite size and the smooth temperature variation contained inside realistic hotspot centres. A one-step Arrhenius reaction is used to model a H2–air reactive mixture. Using the superelliptic approach a range of behaviours for temperature distributions are investigated by varying the temperature profile between the gradient only and plateau and gradient bounding cases. Each superelliptic case is compared to a respective plateau and gradient case where simple acoustic timescale characterisation may be performed. It is shown that hot spots equivalent with excitation-to-acoustic timescale ratios sufficiently greater than unity exhibit behaviour very similar to a simple plateau-gradient model. Furthermore, for larger hot spots with timescale ratios sufficiently less than unity the reaction behaviour is highly dependent on the smooth temperature profile contained within the core region.},
doi = {10.1080/13647830.2017.1381347},
journal = {Combustion Theory and Modelling},
number = 1,
volume = 22,
place = {United States},
year = {Fri Oct 06 00:00:00 EDT 2017},
month = {Fri Oct 06 00:00:00 EDT 2017}
}
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Works referenced in this record:
An Adaptive Wavelet Collocation Method for Fluid-Structure Interaction at High Reynolds Numbers
journal, January 2005
- Kevlahan, Nicholas K. R.; Vasilyev, Oleg V.
- SIAM Journal on Scientific Computing, Vol. 26, Issue 6
The mechans of transition from deflagration to detonation in vapor cloud explosions
journal, January 1980
- Lee, J. H. S.; Moen, I. O.
- Progress in Energy and Combustion Science, Vol. 6, Issue 4
Modes of reaction front propagation from hot spots
journal, April 2003
- Gu, X. J.; Emerson, D. R.; Bradley, D.
- Combustion and Flame, Vol. 133, Issue 1-2
Ignition and combustion of low-exothermicity porous materials by a local hotspot
journal, February 2007
- Shah, A. A.; Brindley, J.; McIntosh, A. C.
- Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 463, Issue 2081
Acoustic timescale characterisation of a one-dimensional model hot spot
journal, June 2014
- Kurtz, Michael D.; Regele, Jonathan D.
- Combustion Theory and Modelling, Vol. 18, Issue 4-5
Regime classification of an exothermic reaction with nonuniform initial conditions
journal, October 1980
- Zeldovich, Y.
- Combustion and Flame, Vol. 39, Issue 2
Influence of autoignition delay time characteristics of different fuels on pressure waves and knock in reciprocating engines
journal, December 2009
- Bradley, D.; Kalghatgi, G. T.
- Combustion and Flame, Vol. 156, Issue 12
On the onset of detonation in a nonuniformly heated gas
journal, January 1972
- Zel'dovich, Ya. B.; Librovich, V. B.; Makhviladze, G. M.
- Journal of Applied Mechanics and Technical Physics, Vol. 11, Issue 2
The response of a compressible gas to extremely rapid transient, spatially resolved energy addition: an asymptotic formulation
journal, August 2010
- Kassoy, D. R.
- Journal of Engineering Mathematics, Vol. 68, Issue 3-4
On detonation initiation by a temperature gradient for a detailed chemical reaction models
journal, April 2011
- Liberman, M. A.; Kiverin, A. D.; Ivanov, M. F.
- Physics Letters A, Vol. 375, Issue 17
An adaptive wavelet-collocation method for shock computations
journal, August 2009
- Regele, J. D.; Vasilyev, O. V.
- International Journal of Computational Fluid Dynamics, Vol. 23, Issue 7
Evolution of a Reaction Center in an Explosive Material
journal, April 1989
- Jackson, T. L.; Kapila, A. K.; Stewart, D. S.
- SIAM Journal on Applied Mathematics, Vol. 49, Issue 2
Evolution of detonation formation initiated by a spatially distributed, transient energy source
journal, August 2016
- Regele, Jonathan D.; Kassoy, David R.; Aslani, Mohamad
- Journal of Fluid Mechanics, Vol. 802
Detonation ignition from a temperature gradient for a two-step chain-branching kinetics model
journal, February 2003
- Sharpe, Gary J.; Short, Mark
- Journal of Fluid Mechanics, Vol. 476
The induction period of a thermal explosion in a gas between infinite parallel plates
journal, January 1983
- Poland, J.; Kassoy, D. R.
- Combustion and Flame, Vol. 50
Acoustic timescale characterisation of symmetric and asymmetric multidimensional hot spots
journal, October 2014
- Kurtz, Michael Drew; Regele, Jonathan David
- Combustion Theory and Modelling, Vol. 18, Issue 6
Fast flames, waves and detonation
journal, January 1989
- Clarke, J. F.
- Progress in Energy and Combustion Science, Vol. 15, Issue 3
Shocks Generated in a Confined Gas Due to Rapid Heat Addition at the Boundary. I. Weak Shock Waves
journal, June 1984
- Clarke, J. F.; Kassoy, D. R.; Riley, N.
- Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 393, Issue 1805
Deflagrations, hot spots, and the transition to detonation
journal, December 1999
- Oran, Elaine S.; Khokhlov, Alexei M.
- Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 357, Issue 1764
The effects of non-uniform temperature distribution on the ignition of a lean homogeneous hydrogen–air mixture
journal, January 2005
- Sankaran, Ramanan; Im, Hong G.; Hawkes, Evatt R.
- Proceedings of the Combustion Institute, Vol. 30, Issue 1
Shocks Generated in a Confined Gas Due to Rapid Heat Addition at the Boundary. II. Strong Shock Waves
journal, June 1984
- Clarke, J. F.; Kassoy, D. R.; Riley, N.
- Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 393, Issue 1805
Numerical simulation of detonation initiation in a flame brush: the role of hot spots
journal, December 1999
- Khokhlov, Alexei M.; Oran, Elaine S.
- Combustion and Flame, Vol. 119, Issue 4
On critical conditions for thermal explosion of a hot spot
journal, December 1966
- Merzhanov, A. G.
- Combustion and Flame, Vol. 10, Issue 4
Photochemical initiation of gaseous detonations
journal, November 1978
- Lee, J. H.; Knystautas, R.; Yoshikawa, N.
- Acta Astronautica, Vol. 5, Issue 11-12
An approximate theory of “hot spot” critically
journal, August 1973
- Thomas, P. H.
- Combustion and Flame, Vol. 21, Issue 1
Second-Generation Wavelet Collocation Method for the Solution of Partial Differential Equations
journal, December 2000
- Vasilyev, Oleg V.; Bowman, Christopher
- Journal of Computational Physics, Vol. 165, Issue 2
Comparison of finite volume flux vector splittings for the Euler equations
journal, September 1986
- Anderson, W. Kyle; Thomas, James L.; Van Leer, Bram
- AIAA Journal, Vol. 24, Issue 9
Direct numerical simulation of ignition front propagation in a constant volume with temperature inhomogeneities
journal, April 2006
- Chen, Jacqueline H.; Hawkes, Evatt R.; Sankaran, Ramanan
- Combustion and Flame, Vol. 145, Issue 1-2
Initiation of Gaseous Detonation
journal, October 1977
- Lee, J. H. S.
- Annual Review of Physical Chemistry, Vol. 28, Issue 1
The response of a confined gas to a thermal disturbance: rapid boundary heating
journal, June 1984
- Radhwan, A. M.; Kassoy, D. R.
- Journal of Engineering Mathematics, Vol. 18, Issue 2
Indirect detonation initiation using acoustic timescale thermal power deposition
journal, September 2013
- Regele, J. D.; Kassoy, D. R.; Vezolainen, A.
- Physics of Fluids, Vol. 25, Issue 9
Numerical investigation of spontaneous flame propagation under RCCI conditions
journal, September 2015
- Bhagatwala, Ankit; Sankaran, Ramanan; Kokjohn, Sage
- Combustion and Flame, Vol. 162, Issue 9
Pre-ignition and ‘super-knock’ in turbo-charged spark-ignition engines
journal, December 2011
- Kalghatgi, Gautam T.; Bradley, Derek
- International Journal of Engine Research, Vol. 13, Issue 4
An investigation of hydrogen-fuelled HCCI engine performance and operation
journal, October 2008
- Gomesantunes, J.; Mikalsen, R.; Roskilly, A.
- International Journal of Hydrogen Energy, Vol. 33, Issue 20
Deflagrations, hot spots, and the transition to detonation
conference, August 1999
- Oran, Elaine; Khokhlov, Alexei
- 30th Fluid Dynamics Conference
Indirect detonation initiation using acoustic timescale thermal power deposition
text, January 2012
- Regele, Jonathan D.; Kassoy, David R.; Vezolainen, Alexei
- arXiv