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Observation of premixed flame fronts by laser tomography

MU Kejin, WANG Yue, LEI Yu, ZHANG Zhedian, NIE Chaoqun, XIAO Yunhan

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 427-432 doi: 10.1007/s11708-008-0069-3

Abstract: An experiment detecting flame fronts by laser tomography was made by employing a V-shaped premixed flameThe results show that the instantaneous geometric shape of flame wrinkles within the light sheet canThe contours of the flame fronts are precisely tracked through active contour models (ACM) from the digitalimages of laser tomography, laying the basis for the quantitative analysis of flame wrinkling and propagation

Keywords： combustion     tomography apparatus     processing     exploitation     propagation    

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Experimental study on premixed combustion of spherically propagating methanol-air-nitrogen flames

Xiangang WANG, Zhiyuan ZHANG, Zuohua HUANG, Xibin WANG, Haiyan MIAO,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 223-233 doi: 10.1007/s11708-010-0016-y

Abstract: The outward propagation and development of surface instability of the spark-ignited spherical premixedThe initial pressure has a significant influence on the occurrence of the flame front cellular structureAt the elevated pressures, the cracks on the flame surface branch and develop into the cell structure, the buoyancy effect and cooling effect from the spark electrodes have a significant impact on the flame

Keywords： methanol     spherical flame     propagation characteristics     flame instabilities    

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Identifying combustion intermediates in premixed MTBE/gasoline/oxygen flame probed via synchrotron radiation

YAO Chunde, LI Jing, LI Qi, JI Qing, HUANG Chaoqun, WEI Lixia, WANG Jing, TIAN Zhenyu, LI Yuyang, QI Fei

Frontiers in Energy 2007, Volume 1, Issue 1,   Pages 79-84 doi: 10.1007/s11708-007-0007-9

Abstract: tunable synchrotron radiation photoionization technique offers obvious advantages for the study of flameother techniques because of the precision measurement of the combustion intermediates and products in flameIn this paper, the results to identify combustion intermediates in low-pressure premixed gasoline/oxygenflame with the synchrotron radiation were reported.The results achieved provide data basis for the analysis of intermediates and radicals in flame, and

Keywords： synchrotron     photoionization technique     chemistry     analysis     difference    

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Soot size distribution in lightly sooting premixed flames of benzene and toluene

Wang LIU, Jiaqi ZHAI, Baiyang LIN, He LIN, Dong HAN

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 18-26 doi: 10.1007/s11708-020-0663-6

Abstract: The evolution of particle size distribution function (PSDF) of soot in premixed flames of benzene andtoluene was studied on a burner stabilized stagnation (BSS) flame platform.It was observed that soot nucleation and particle growth in the benzene flame were stronger than thosein the toluene flame at short residence times.particle size distribution range and a higher particle volume fraction than the benzene flame.

Keywords： premixed flame     soot     particle size distribution function     benzene     toluene    

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Exergy losses in premixed flames of dimethyl ether and hydrogen blends

Tongbin ZHAO, Jiabo ZHANG, Dehao JU, Zhen HUANG, Dong HAN

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 658-666 doi: 10.1007/s11708-019-0645-8

Abstract: A second-law thermodynamic analysis was conducted for stoichiometric premixed dimethyl ether (DME)/hydrogensubstitution decreases the exergy losses from reactions, conduction, and diffusion, primarily because of the flame

Keywords： second law analysis     flame     dimethyl ether (DME)     hydrogen     binary fuels    

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Numerical simulation of laminar premixed combustion in a porous burner

ZHAO Pinghui, CHEN Yiliang, LIU Minghou, DING Min, ZHANG Genxuan

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 233-238 doi: 10.1007/s11708-007-0032-8

Abstract: Premixed combustion in porous media differs substantially from combustion in free space.The interphase heat transfer between a gas mixture and a porous medium becomes dominant in the premixedIn this paper, the premixed combustion of CH

Keywords： interphase     mixture     dominant     Premixed combustion     premixed combustion    

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Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 988-999 doi: 10.1007/s11708-021-0755-y

Abstract: “Flame-street” is an interesting diffusion flame behavior in which a series of flame-segments is separatelyflame experienced a flame shape/type change from a tribrachial structure in its fast-propagating phaseThe successive flame had a much lower propagation speed, keeping its two wing-like (fuel-lean premixedand fuel-rich premixed) structure while moving toward its stabilization location, which was approximatelyMoreover, chemical insights for the premixed and diffusion branches of the leading flame were also provided

Keywords： micro-combustion     flame-street     diffusion flame     mixing layer     flame propagation speed    

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Modification of premixed combustion in shear layers by grid turbulence

MU Kejin, WANG Yue, ZHANG Zhedian, NIE Chaoqun

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 245-250 doi: 10.1007/s11708-007-0034-6

Abstract: The influence of grid turbulence on the shear layer of a jet and the premixed flames embedded in it wasFlame temperature was measured by using a compensated fine-wire thermocouple.It was found that grid turbulence reduced low frequency fluctuation of the flame fronts, increased thesmall-scale wrinkles and elevated the mean temperature of the flame zone.The results show that grid turbulence can enhance and stabilize premixed flames in shear flow.

Keywords： homogeneous     fine-wire thermocouple     temperature     hot-wire anemometry     premixed    

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NC flame pipe cutting machine tool based on open architecture CNC system

Xiaogen NIE, Yanbing LIU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 147-152 doi: 10.1007/s11465-009-0025-x

Abstract: Based on the analysis of the principle and flame movement of a pipe cutting machine tool, a retrofitNC flame pipe cutting machine tool (NFPCM) that can meet the demands of cutting various pipes is proposed

Keywords： flame pipe cutting     flame incision tracks     CNC     open architecture CNC system    

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Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

Chen DONG, Qulan ZHOU, Xiaoguang ZHANG, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 417-422 doi: 10.1007/s11705-010-0515-8

Abstract: Laminar flame speeds of hydrogen/natural gas/air mixtures have been measured over a full range of fuelHigh sensitivity scientific CCD camera is use to capture the image of laminar flame.The reaction zone area is employed to calculate the laminar flame speed.The laminar flame speeds of hydrogen/air mixture and natural gas/air mixture reach their maximum valuesUsing these formulas, the laminar flame speed at different hydrogen fractions and equivalence ratios

Keywords： laminar flame speed     experimental study     Bunsen flame    

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Experimental study on velocity characteristics of recirculation zone in humid air non-premixed flame

GU Xin, ZANG Shusheng, GE Bing

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 140-144 doi: 10.1007/s11708-008-0037-y

Abstract: To examine the effect of the flow field within the recirculation zone on flame structure, the characteristicvelocity fields of methane/humid air flame in non-premixed combustion behind a disc bluff-body burner(PIV).The results show that two stagnation points exist on the centerline in the recirculation zone flamecurves of the minimal velocities can be partitioned into three phases representing three different flamereveals that fuel-to-air velocity ratio is the crucial parameter that governs humid air combustion flame

Keywords： distance     bluff-body     fuel-to-air velocity     stagnation     parameter    

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Experimental and kinetic study on laminar flame speeds of ammonia/syngas/air at a high temperature and

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 263-276 doi: 10.1007/s11708-021-0791-7

Abstract: The laminar flame speeds of ammonia mixed with syngas at a high pressure, temperature, and different

Keywords： ammonia mixed with syngas     laminar flame speed     kinetic model     sensitivity analysis     pathway analysis    

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Molybdenum disulfide@nickel phyllosilicate hybrid for improving the flame retardancy and wear resistance

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2114-2126 doi: 10.1007/s11705-023-2357-1

Abstract: The thermal stability, flame retardancy, and frictional performances of epoxy composites were studied

Keywords： molybdenum disulfide     nickel phyllosilicate     epoxy resin     flame retardancy    

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A low-density polyethylene composite with phosphorus-nitrogen based flame retardant and multi-walledcarbon nanotubes for enhanced electrical conductivity and acceptable flame retardancy

Yong Luo, Yuhui Xie, Renjie Chen, Ruizhi Zheng, Hua Wu, Xinxin Sheng, Delong Xie, Yi Mei

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1332-1345 doi: 10.1007/s11705-021-2035-0

Abstract: Design and exploitation of flame retardant polymers with high electrical conductivity are desired forHerein, a novel phosphorus-nitrogen intumescent flame retardant was synthesized from pentaerythritolLow-density polyethylene was combined with the flame retardant and multi-walled carbon nanotubes to formThe electrical conductivity, mechanical properties, thermal performance, and flame retardancy of theFurthermore, the combination of multi-walled carbon nanotubes and phosphorus–nitrogen flame retardant

Keywords： MWCNTs     PEPA     electrical conductivity     flame retardant     low density polyethylene    

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A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane

Jie JI, Junrui DUAN, Huaxian WAN

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1017-1026 doi: 10.1007/s11708-020-0716-x

Abstract: The interaction of multiple fires may lead to a higher flame height and more intense radiation flux thana single fire, which increases the possibility of flame spread and risks to the surroundings.For non-merging flames ( / >0.368), the flame height is almost identical to a single fire; for merging), a quantitative analysis of the flame height, merging point height, and air entrainment was formed,and the calculated merging flame heights show a good agreement with the measured experimental values

Keywords： flame interaction     air entrainment     flame height     multi-point source model     thermal radiation    

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Title Author Date Type Operation

Observation of premixed flame fronts by laser tomography

MU Kejin, WANG Yue, LEI Yu, ZHANG Zhedian, NIE Chaoqun, XIAO Yunhan

Journal Article

Experimental study on premixed combustion of spherically propagating methanol-air-nitrogen flames

Xiangang WANG, Zhiyuan ZHANG, Zuohua HUANG, Xibin WANG, Haiyan MIAO,

Journal Article

Identifying combustion intermediates in premixed MTBE/gasoline/oxygen flame probed via synchrotron radiation

YAO Chunde, LI Jing, LI Qi, JI Qing, HUANG Chaoqun, WEI Lixia, WANG Jing, TIAN Zhenyu, LI Yuyang, QI Fei

Journal Article

Soot size distribution in lightly sooting premixed flames of benzene and toluene

Wang LIU, Jiaqi ZHAI, Baiyang LIN, He LIN, Dong HAN

Journal Article

Exergy losses in premixed flames of dimethyl ether and hydrogen blends

Tongbin ZHAO, Jiabo ZHANG, Dehao JU, Zhen HUANG, Dong HAN

Journal Article

Numerical simulation of laminar premixed combustion in a porous burner

ZHAO Pinghui, CHEN Yiliang, LIU Minghou, DING Min, ZHANG Genxuan

Journal Article

Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Journal Article

Modification of premixed combustion in shear layers by grid turbulence

MU Kejin, WANG Yue, ZHANG Zhedian, NIE Chaoqun

Journal Article

NC flame pipe cutting machine tool based on open architecture CNC system

Xiaogen NIE, Yanbing LIU

Journal Article

Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

Chen DONG, Qulan ZHOU, Xiaoguang ZHANG, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Journal Article

Experimental study on velocity characteristics of recirculation zone in humid air non-premixed flame

GU Xin, ZANG Shusheng, GE Bing

Journal Article

Experimental and kinetic study on laminar flame speeds of ammonia/syngas/air at a high temperature and

Journal Article

Molybdenum disulfide@nickel phyllosilicate hybrid for improving the flame retardancy and wear resistance

Journal Article

A low-density polyethylene composite with phosphorus-nitrogen based flame retardant and multi-walledcarbon nanotubes for enhanced electrical conductivity and acceptable flame retardancy

Yong Luo, Yuhui Xie, Renjie Chen, Ruizhi Zheng, Hua Wu, Xinxin Sheng, Delong Xie, Yi Mei

Journal Article

A method of determining flame radiation fraction induced by interaction burning of tri-symmetric propane

Jie JI, Junrui DUAN, Huaxian WAN

Journal Article