Extinction of premixed H2/air flames: Chemical kinetics and molecular diffusion effects

Dong, Yubing; Holley, Adam T.; Andac, M. Gurhan; Egolfopoulos, Fokion N.; Davis, Scott; Middha, Prankul; Wang, Shuangfeng

doi:10.1016/j.combustflame.2005.03.017

Cited by 93 publications

(55 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Predictions of extinction strain rates and laminar flame speeds agree well with experiment across the whole range of lean to rich hydrogen-air mixtures [5,6,7], but when the focus is just very lean flames, then the relative scatter is large. The variation can be seen for extinction strain rates in [6,Fig.…”

Section: Introductionsupporting

confidence: 60%

See 1 more Smart Citation

The Soret effect in naturally propagating, premixed, lean, hydrogen–air flames

Grcar

Bell

Day

2009

Proceedings of the Combustion Institute

View full text Add to dashboard Cite

show abstract

Section: Introductionsupporting

confidence: 60%

“…Nevertheless, predictions are comparably sensitive to both reaction and transport properties [8,6,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

The Soret effect in naturally propagating, premixed, lean, hydrogen–air flames

Grcar

Bell

Day

2009

Proceedings of the Combustion Institute

View full text Add to dashboard Cite

show abstract

“…The results are shown in Fig. 13 [25]. An increase in the diffusivity of H 2 leads to a greater increase in the thickness of the H 2 diffusive layer, which in turn results in weaker H 2 concentration gradients.…”

Section: Molecular Diffusionmentioning

confidence: 82%

“…There is also evidence that the effects of uncertainties on molecular diffusion coefficients are significant in computing hydrogen flame-extinction process [25]. Sensitivity analyses can be useful in sorting out these dependencies.…”

Section: Sensitivity Analysismentioning

confidence: 99%

A study of the effects of diluents on near-limit H2–air flames in microgravity at normal and reduced pressures

Qiao

Dahm

et al. 2007

Combustion and Flame

View full text Add to dashboard Cite

“…In this collaborative project (with Professor Fokion Egolfopoulos of USC), we validated a H 2 -CO kinetic model and its associated, revised transport database [1] against the extinction of premixed ultralean H 2 /air flames [2]. Theoretical attention has been placed on the relative sensitivity of predicted flame extinction with respect to reaction kinetics and species diffusion coefficients.…”

Section: Technical Discussion: 1 Validation Of Chemistry and Transpomentioning

confidence: 99%

Development of a Comprehensive and Predictive Reaction Mechanism of Liquid Hydrocarbon Combustion

Wang¹

2007

Self Cite

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) Air Force Office of Scientific Research NUMBER(S) DISTRIBUTION/ AVAILABILITY STATEMENTApproved for public release; distribution is unlimited AFRL-SR-AR-TR-07-01 00 SUPPLEMENTARY NOTES ABSTRACTStudies were conducted in several relevant areas, including (1) validation of the chemistry and transport models against the extinction of ultra-lean premixed hydrogen-air mixtures, (2) a comprehensive theoretical analysis of the reaction kinetics of carbon monoxide and the hydroxyl radical, (3) a theoretical kinetic study of the decomposition of ethylene oxide; (4) a gas-kinetic analysis for the transport properties of long chain molecules in dilute gases, (5) quantum-chemistry, master equation modeling of the unimolecular decomposition of orthobenzyne, (6) extension of the previously developed hydrogen/carbon model to combustion pressures as high as 600 atm, (7) an updated kinetic mechanism of small-hydrocarbon fuel combustion for use as a kinetic foundation of higher hydrocarbon combustion, and (8) a methodology for kinetic uncertainty propagation. These projects represent the two key ingredients for meeting the overall project objectives: (a) an accurate physico-chemical property database for combustion kinetics, and (b) a unified and optimized kinetic model for liquid aliphatic and aromatic fuel combustion with quantifiable uncertainties.15.

show abstract

Extinction of premixed H2/air flames: Chemical kinetics and molecular diffusion effects

Cited by 93 publications

References 21 publications

The Soret effect in naturally propagating, premixed, lean, hydrogen–air flames

The Soret effect in naturally propagating, premixed, lean, hydrogen–air flames

A study of the effects of diluents on near-limit H2–air flames in microgravity at normal and reduced pressures

Development of a Comprehensive and Predictive Reaction Mechanism of Liquid Hydrocarbon Combustion

Contact Info

Product

Resources

About