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Search Publications by: Gregory T. Linteris (Fed)

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Displaying 26 - 50 of 196

R-152a/air and R-134a/oxygen constant volume spherical flame burning velocity measurements

March 25, 2019
Author(s)
Robert R. Burrell, Gregory T. Linteris, Donald R. Burgess Jr., Michael J. Hegetschweiler, Jeffrey A. Manion, Valeri I. Babushok
Many presently used refrigerants are non-flammable but are being phased out due to concerns about their strong global warming potential (GWP). Replacements with low GWP exist but tend to be flammable with a maximum burning velocity in air between 1 cm/s

Low-GWP Alternative Refrigerant Blends for HFC-134a

September 7, 2018
Author(s)
Piotr A. Domanski, Mark O. McLinden, Ian H. Bell, Gregory T. Linteris
The goal of this study was to identify non-flammable, non-toxic, low global-warming-potential (GWP) replacements for HFC-134a in an air-conditioning system that would maintain the energy efficiency and capacity. A prior exhaustive work demonstrated that

Kinetic Mechanism of 2,3,3,3-Tetrafluoropropene (HFO-1234yf) Combustion

July 16, 2018
Author(s)
Valeri I. Babushok, Gregory T. Linteris
A kinetic model for 2,3,3,3-tetrafluoropropene (HFO-1234yf) high temperature oxidation and combustion is proposed. It is combined with the GRI-Mech-3.0 model, with the previously developed model for 2-bromo-3,3,3-trifluoropropene (2-BTP), and with the NIST

Burning Velocities of Marginally Flammable Refrigerant-Air Mixtures

May 1, 2018
Author(s)
Gregory T. Linteris
Refrigerant working fluids have been predicted to be large contributors to the increase in radiative forcing of the earth. Consequently, existing compounds will soon be phased out. Low- GWP replacements exist, but they tend to be mildly flammable, and

Development and Validation of a Mechanism for Flame Propagation in R-32/Air Mixtures

March 6, 2018
Author(s)
Donald R. Burgess Jr., Jeffrey A. Manion, Robert R. Burrell, Valeri I. Babushok, Michael Hegetschweiler, Gregory T. Linteris
A mechanism for the combustion of the refrigerant R-32 (CH2F2) in air mixtures was developed and validated through comparisons with measured flame speeds for a range of equivalence ratios (0.9 to 1.4) and pressures (1 to 3 bar) using a constant-volume

Flammability: A Continuum Vs. Discrete Boundary

January 24, 2018
Author(s)
Gregory T. Linteris
The goals of this talk are: 1.) Understand that flammability behavior is device/configuration dependent, and 2.) Understand the features that influence the flammability behavior of a fuel-air mixture.

Flame Inhibition by Potassium-Containing Compounds

June 30, 2017
Author(s)
Valeri I. Babushok, Gregory T. Linteris, Pol Hoorelbeke
A kinetic model of inhibition by the potassium containing compound potassium bicarbonate is suggested. The model is based on the previous work concerning kinetic studies of suppression of secondary flashes, inhibition by alkali metals and the studies of

Extinguishment and Enhancement of Propane Cup-Burner Flames by Halon and Alternative Agents

September 20, 2016
Author(s)
Gregory T. Linteris, Fumiaki Takahashi, Viswanath R. Katta, Valeri I. Babushok
Computations of cup-burner flames in normal gravity have been performed to reveal the combustion inhibition and enhancement by the CF3Br (halon 1301) and potential alternative fire-extinguishing agents (C2HF5, C2HF3Cl2, and C3H2F3Br). The time-dependent

Gas-Phase Interactions of Phosphorus Containing Compounds with Cup-Burner Diffusion Flames

September 20, 2016
Author(s)
Gregory T. Linteris, Fumiaki Takahashi, Viswanath R. Katta, Valeri I. Babushok
The effects of phosphorus-containing compounds (PCC) on the extinguishment and structure of methane-air coflow diffusion flames, in the cup-burner configuration, have been studied computationally. Dimethyl methylphosphonate (DMMP), trimethyl phosphate (TMP

Influence of Antimony-Halogen Additives on Flame Propagation

July 8, 2016
Author(s)
Valeri I. Babushok, Peter Deglmann, Gregory T. Linteris, Roland H. Kraemer
A kinetic model for flame inhibition by antimony-halogen compounds in hydrocarbon flames is developed. Thermodynamic data for the relevant species are assembled from the literature, and calculations are performed for a large set of additional species of Sb

Influence of Hydrocarbon Moiety of DMMP on Flame Propagation in Lean Mixtures

July 7, 2016
Author(s)
Gregory T. Linteris, Valeri I. Babushok, Viswanath R. Katta, Fumiaki Takahashi
Phosphorus-containing compounds (PCCs) have been found to be significantly more effective than CF3Br for reducing burning velocity when added to stoichiometric hydrocarbon-air flames. However, when added to lean flames, DMMP (dimethylmethylphosphonate) is

Premixed flame inhibition by CF3Br and C3H2F3Br (2-BTP)

June 1, 2016
Author(s)
John Pagliaro, Gregory T. Linteris, Nicolas Bouvet
The un-stretched burning velocities and Markstein lengths of premixed CH4- and C3H8-air flames with added C3H2F3Br (2-BTP) or CF3Br (Halon 1301), have been studied experimentally and numerically. The predicted un-stretched burning velocities, using a

Burning Velocities of Marginally Flammable Refrigerant-Air Mixtures

April 21, 2016
Author(s)
John Pagliaro, Gregory T. Linteris
Refrigerant working fluids have been predicted to be large contributors to the increase in radiative forcing of the earth. Consequently, existing compounds will soon be phased out. Low-GWP replacements exist, but they tend to be mildly flammable, and there

Understanding Overpressure in the FAA Aerosol Can Test by C3H2F3Br (2-BTP)

March 18, 2016
Author(s)
Gregory T. Linteris, Valeri I. Babushok, John L. Pagliaro, Jeffrey A. Manion, Donald R. Burgess Jr., Fumiaki Takahashi, Viswanath R. Katta, Patrick T. Baker
Thermodynamic equilibrium calculations, as well as perfectly-stirred reactor (PSR) simulations with detailed reaction kinetics, are performed for a potential halon replacement, C3H2F3Br (2-BTP, C3H2F3Br, 2-Bromo-3,3,3-trifluoropropene), to understand the