Temperature Dependence of Stability Limits of Burner Flames

Grumer, J.; Harris, Margaret E.

doi:10.1021/ie50539a057

Cited by 23 publications

(7 citation statements)

References 4 publications

(12 reference statements)

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“…The overall test matrix was replicated once to improve the quality of the correlation developed and assess repeatability. As mentioned above, previous studies noted that the injector tip temperature influenced flashback propensity [8,11,14,28]. This was noted in the present work as well.…”

Section: Analysis Of Variancesupporting

confidence: 87%

“…Based on such a frame work, considerable experimental work has been conducted under various test conditions. Grumer et al conducted many flashback experiments on burner tubes for various fuel compositions using Lewis and Von Elbe's approach to explain the resulting data [5][6][7][8][9][10]. Bollinger, et al investigated effects of burner tip temperature on flashback of turbulent H2/O2 flames.…”

Section: Introductionmentioning

confidence: 99%

“…Fine performed experiments to determine the temperature and pressure effect on the critical velocity gradient [12][13][14]. Caffo et al and van Krevelen et al [15,16] developed some correlations using flashback data collected by Grumer et al for laminar flames in small tubes [5][6][7][8][9][10]. An additional correlation was proposed by Putnam et al and Ball et al [17,18] after investigating flashback for many different fuel compositions under laminar conditions and using small tube sizes.…”

Section: Introductionmentioning

confidence: 99%

“…Although previous works investigated turbulent flashback [11-14, 23, 26-28] their focus was not on the investigation of the effect of fuel composition whereas much of the previous work that directly examined the effect of fuel composition variation on flashback used smaller diameter tubes (<25 mm) where turbulent effects were less prevalent [5][6][7][8][9][10][15][16][17][18]. For several studies [8,11,14,28], the importance of bumer rim conditions such as tip temperature was noted, but these effects have not been studied systematically. CFD methods predicting BLF have been developed, but need further validation, i.e., more experimental data [22,25].…”

Section: Introductionmentioning

confidence: 99%

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Study of Fuel Composition Effects on Flashback Using a Confined Jet Flame Burner

Shaffer

Duan

McDonell

2012

Journal of Engineering for Gas Turbines and Power

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Flashback is the main operability issue associated with converting lean, premixed combustion systems from operation on natural gas to operation on high hydrogen content fuels. Most syngas fuels contain some amount of hydrogen (15-100%) depending on the fuel processing scheme. With this variability in the composition of syngas, the question of how fuel composition impacts flashback propensity arises. To address this question, a jet burner configuration was used to develop systematic data for a wide range of compositions under turbulent flow conditions. The burner consisted of a quartz burner tube confined by a larger quartz tube. The use of quartz allowed visualization of the flashback processes occurring. Various fuel compositions of hydrogen, carbon monoxide, and natural gas were premixed with air at equivalence ratios corresponding to constant adiabatic flame temperatures (AFT) of 1700K and 1900K. Once aflame was stabilized on the burner, the air flow rate would be gradually reduced while holding the AFT constant via the equivalence ratio until flashback occurred. Schlieren and intensified OH* images captured at high speeds during flashback allowed some additional understanding of what is occurring during the highly dynamic process of flashback. Confined and unconfined flashback data were analyzed by comparing data collected in the present study with existing data in the literature. A statistically designed test matrix was used which allows analysis of variance of the results to be carried out, leading to correlation between fuel composition and flame temperature with (1) critical flashback velocity gradient and (2) burner tip temperature. Using the burner tip temperature as the unburned temperature in the laminar flame speed calculations showed increased correlation of the flashback data and laminar flame speed as opposed to when the actual unburned gas temperature was tised.

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Section: Analysis Of Variancesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of Fuel Composition Effects on Flashback Using a Confined Jet Flame Burner

Shaffer

Duan

McDonell

2012

Journal of Engineering for Gas Turbines and Power

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“…The first sub-atmospheric condition flashback experiment was conducted by Garside et al [48]. The first turbulent and high pressure flashback study was done by Edse [49], while the effect of preheat and tip temperature were first achieved by Grumer and Harris [50] and Bollinger and Edse [51], respectively. Lee and T'ien [52] first conducted a numerical study on the propagation of a premixed laminar flame inside a tube.…”

Section: Beginning Studies On Boundary Layer Flashbackmentioning

confidence: 99%