Structures and performances of laminar impinging multiple premixed LPG–air flames

Makmool, U.; Jugjai, Sumrerng; Tia, Suvit

doi:10.1016/j.fuel.2013.05.028

Cited by 19 publications

(7 citation statements)

References 17 publications

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“…The variations of pollutants emissions in impinging flames with different nozzle to plate distances had been included in many 74,77,[79][80][81][82]88,89 studies.…”

Section: Effects Of Nozzle To Plate Distances On Co Emissions In Fwimentioning

confidence: 99%

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Luo¹,

Liu²

2018

ES Energy Environ.

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Flame-wall interactions (FWI) as one kind of fundamental combustion phenomenon is universally found in various laboratory and practical combustion devices. It not only affects the combustion and energy conversion efficiency but also induces severe pollutants emissions. This review summarizes the pollutants emission characteristics in FWI from CO and soot aspects. The investigations of CO formation from FWI in various fundamental and practical energy conversion systems with different fuel types, operating conditions, sampling and analyzing methods and etc. are separately discussed. Meanwhile, multiple advanced laser diagnostics techniques are also adopted in different laboratory impinging flames to acquire more accurate and precise measurements of CO distributions in FWI. To gain more knowledge of pollutants emissions in FWI, the behaviors of soot from practical internal engines are observed with the aid of visualization techniques. Studies that utilize different combustion system configurations to modulate soot formation in FWI of practical engines are conducted as well. Recent literature subsequently evaluates the variations of soot morphology and nanostructure in FWI. The characteristics of soot particle size distribution function (PSDF) from FWI are briefly studied via burner-stabilized stagnation (BBS) flames at laboratory scale. The review ends with the unresolved issues for the future research.

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“…The variations of pollutants emissions in impinging flames with different nozzle to plate distances had been included in many 74,77,[79][80][81][82]88,89 studies.…”

Section: Effects Of Nozzle To Plate Distances On Co Emissions In Fwimentioning

confidence: 99%

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Luo¹,

Liu²

2018

ES Energy Environ.

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“…Jets with an array can help to enhance the heat transfer for heating a large surface area and to avoid local hot spots [25]. Multiple impinging flame jet studies on laminar combustion have investigated the effects of flame jet arrays [26][27][28][29][30]. Experiments revealed the effect of the parameters on the local heat flux distribution on an impinging plate.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Steel-Plate Temperature during Preheating by Using Guide Vanes to Focus the Flame at the Outlet of a Gas Torch

Ngo

Zhou

et al. 2019

Energies

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The temperature distribution on a steel plate during a preheating process was comparedusing gas torch models with and without guide vanes. Numerical simulations were done usingANSYS FLUENT software, and experiments were done using thermal images obtained by aTVS-200EX infrared thermal camera. Liquefied petroleum gas (LPG) was used as fuel for the gastorch in the simulation and experiment. The temperature distribution on the steel plate and theflame region were first compared. The temperature increase caused by the flame concentrationwith the guide vanes was 65 C. The transient and steady-state temperature distribution on theback side of the steel plate were then examined. The results showed good agreement between thesimulation and experimental results. At steady state, the back-side temperature deviation of thesteel plate between the numerical simulation and experimental results was approximately 4.9%.The effects of the equivalence ratio (Φ), Reynolds number (Re), and the downstream distance ratioof the combustion gas from the torch outlet to the steel plate (H/d) on the temperature distributionwere also investigated. The highest temperature distribution was found in stoichiometriccombustion. The temperature of the plate increased as the Reynolds number increased from 2368 to4876 but decreased as the distance ratio (H/d) increased from 25 to 75. The guide vane angles at thegas torch outlet were from 30 to 60 degrees, and the angle of 40 degrees resulted in the highesttemperature of the steel plate.

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“…Moreover, they used OH PLIF technique to clarify combustion and thermal performance of the laminar, premixed liquefied petroleum gas impinging flames of cooking burners. 16 Maurizio et al 17 studied the reaction characteristics of opposed flow methane oxy-flames under different oxygen concentrations with OH* and CH* luminescence. It was found that both OH* and CH* radicals are generated in reaction zone, and the peak intensity is a good indicator of the flame front.…”

Section: Introductionmentioning

confidence: 99%

“…Makmool et al investigated the characteristics of reaction zone in impinging flames of two typical cooker‐top burners by using OH* radicals. Moreover, they used OH PLIF technique to clarify combustion and thermal performance of the laminar, premixed liquefied petroleum gas impinging flames of cooking burners . Maurizio et al studied the reaction characteristics of opposed flow methane oxy‐flames under different oxygen concentrations with OH* and CH* luminescence.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on CH* chemiluminescence characteristics of impinging flames in an opposed multi‐burner gasifier

et al. 2016

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The bandpass filtered images of impinging flames in an opposed multi‐burner (OMB) gasifier was visualized by a CCD camera combined with a high temperature endoscope. A filtering and image processing method by use of three bandpass filters was applied to subtract soot and CO2* contributions in the CH* band and obtain the CH* chemiluminescence of impinging flames. The results show that a clear reaction core is generated in the impinging zone of four‐burner impinging flames. The size of the reaction core is affected by the O/C equivalence ratio ([O/C]e) and the impingement effect is relatively stronger at lower [O/C]e. The flame lift‐off length in the gasifier is jointly controlled by the syngas concentration and the diesel atomization effect. The impingement effect shortens the flame lift‐off length. The relationship between the syngas concentration and the maximum CH* intensity makes it possible to evaluate the syngas concentration from CH* intensity. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2007–2018, 2017

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Structures and performances of laminar impinging multiple premixed LPG–air flames

Cited by 19 publications

References 17 publications

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Pollutants Emissions of CO and Soot from Flame-wall Interactions in Fundamental and Practical Energy Conversion Systems: A Review

Improvement of the Steel-Plate Temperature during Preheating by Using Guide Vanes to Focus the Flame at the Outlet of a Gas Torch

Experimental study on CH* chemiluminescence characteristics of impinging flames in an opposed multi‐burner gasifier

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