Hydroxyl radical chemiluminescence imaging and the structure of microgravity droplet flames

Marchese, Anthony J.; Dryer, Frederick L.; Nayagam, Vedha; Colantonio, Renato O.

doi:10.1016/s0082-0784(96)80338-9

Cited by 48 publications

(29 citation statements)

References 14 publications

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“…The pair of hydroxymethyl (65,70) reactions are in direct competition with each other. The decomposition reaction (65) produces H-atoms that go on to reaction (1).…”

Section: Shock Tubesmentioning

confidence: 99%

A comprehensive mechanism for methanol oxidation

Held

Dryer

1998

Int. J. Chem. Kinet.

177

172

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A comprehensive detailed chemical kinetic mechanism for methanol oxidation has been developed and validated against multiple experimental data sets. The data are from static-reactor, flow-reactor, shock-tube, and laminar-flame experiments, and cover conditions of temperature from pressure from and equivalence ratio from 0.05-633-2050 K, 0.26-20 atm, 2.6. Methanol oxidation is found to be highly sensitive to the kinetics of the hydroperoxyl radical through a chain-branching reaction sequence involving hydrogen peroxide at low temperatures, and a chain-terminating path at high temperatures. The sensitivity persists at unusually high temperatures due to the fast reaction of comparedThe branching ratio ofwas found to be a more important parameter under the higher temperature conditions, H O 2 due to the rate-controlling nature of the branching reaction of the H-atom formed through CH 3 O thermal decomposition.

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“…The pair of hydroxymethyl (65,70) reactions are in direct competition with each other. The decomposition reaction (65) produces H-atoms that go on to reaction (1).…”

Section: Shock Tubesmentioning

confidence: 99%

A comprehensive mechanism for methanol oxidation

Held

Dryer

1998

Int. J. Chem. Kinet.

177

172

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“…Its experimental simplicity due to an optically passive nature compared to laser diagnostics is quite attractive for applications in microgravity experiments [1][2][3] and sensors for active combustion control [4]. * Although the chemiluminescence, which arises from minor excited-state species, may not likely provide fundamental information on flame chemistry, the advantages of chemiluminescence diagnostics have further encouraged both modeling of excited species and experiments over a wide range of chemiluminescent emission spectra.…”

Section: Introductionmentioning

confidence: 99%

Basic aspects of OH(A), CH(A), and C2(d) chemiluminescence in the reaction zone of laminar methane–air premixed flames

Kojima

Ikeda

Nakajima

2005

Combustion and Flame

189

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“…Although extraction of such data from video imaging, for example, has challenges [37,38], the d 2 -law has been verified over many decades through droplet combustion experiments quantifying the rate of quasisteady decay in d 2 over time. K is known to depend on the liquid fuel, the pressure, temperature, and surrounding oxidizer constituents, and, in particular, operation in microgravity as compared with normal gravity [31,[39][40][41][42]. In the absence of buoyancy, the diffusion flames surrounding fuel droplets in microgravity have an average standoff distance from the liquid surface that is considerably larger than in normal gravity, and hence the burning rate constant K is typically smaller, perhaps by 40% or more, in microgravity [31].…”

Section: Single Fuel Droplet As a Basic Model For Condensed Phase Commentioning

confidence: 99%

“…Chemiluminescence of the electronically excited hydroxyl radical, OH*, is a proven marker of heat release rate in a variety of premixed systems [64][65][66][67][68], and is also found to be representative of heat release in non-premixed regimes [69][70][71], including in diffusion flames associated with burning droplets within microgravity environments [40,41].…”

Section: Acoustically Coupled Fuel Droplet Combustion: Bulk Behaviormentioning

confidence: 99%

Acoustically Coupled Combustion of Liquid Fuel Droplets

Karagozian

2016

Applied Mechanics Reviews

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The dynamics of oscillatory flames is relevant to acoustically coupled combustion instabilities arising in many practical engineering systems. This paper reviews fundamental studies that pertain to the combustion of single liquid fuel droplets in an acoustically resonant environment. This flow field is not only an idealized model for the study of the fundamental interaction of reactive, evaporative, acoustic, and other transport-based timescales, but it may also be used to identify relevant phenomena in more complex or practical geometries that require a focus for future combustion control efforts. The nature of these phenomena is discussed in detail, in addition to their implications for broader issues associated with combustion instabilities.

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Hydroxyl radical chemiluminescence imaging and the structure of microgravity droplet flames

Cited by 48 publications

References 14 publications

A comprehensive mechanism for methanol oxidation

A comprehensive mechanism for methanol oxidation

Basic aspects of OH(A), CH(A), and C2(d) chemiluminescence in the reaction zone of laminar methane–air premixed flames

Acoustically Coupled Combustion of Liquid Fuel Droplets

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