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Studies of radiation absorption on flame speed and flammability limit of CO2 diluted methane flames at elevated pressures

Published on Jan 1, 2007
· DOI :10.1016/j.proci.2006.07.202
Zheng Chen30
Estimated H-index: 30
(Princeton University),
Xiao Qin7
Estimated H-index: 7
(Princeton University)
+ 2 AuthorsFengshan Liu1
Estimated H-index: 1
(National Research Council)
Cite
Abstract
Abstract The effects of spectral radiation absorption on the flame speed at normal and elevated pressures were experimentally and numerically investigated using the CO 2 diluted outwardly propagating CH 4 –O 2 –He flames. Experimentally, the laminar burning velocities of CH 4 –O 2 –He–CO 2 mixtures at both normal and elevated pressures (up to 5 atm) were measured by using a pressure-release type spherical bomb. The results showed that radiation absorption with CO 2 addition increases the flame speed and extends the flammability limit. In addition, it was also shown that the increase of pressure augments the effect of radiation absorption. Computationally, a fitted statistical narrow-band correlated- k (FSNB-CK) model was developed and validated for accurate radiation prediction in spherical geometry. This new radiation scheme was integrated to the compressible flow solver developed to simulate outwardly propagating spherical flames. The comparison between experiment and computation showed a very good agreement. The results showed that the flame geometry have a significant impact on radiation absorption and that the one-dimensional planar radiation model was not valid for the computation of the flame speed of a spherical flame. An effective Boltzmann number is extracted from numerical simulation. Furthermore, the FSNB-CK model was compared with the grey band SNB model. It was shown that the grey band SNB model over-predicts the radiation absorption. It is concluded that quantitative prediction of flame speed and flammability limit of CO 2 diluted flame requires accurate spectral dependent radiation model.
  • References (33)
  • Citations (82)
Cite
References33
Newest
Published on Jan 1, 2005
Xiao Qin7
Estimated H-index: 7
(Princeton University),
Yiguang Ju54
Estimated H-index: 54
(Princeton University)
Abstract Laminar burning velocities of dimethyl ether (DME) and air premixed flames at elevated pressures up to 10 atm were measured by using a newly developed pressure-release type spherical bomb. The measurement system was validated using laminar burning velocities of methane–air flames. A comparison with the previous experimental data shows an excellent agreement and demonstrates the accuracy and reliability of the present experimental system. The measured flame speeds of DME–air flames were ...
Michael F. Modest36
Estimated H-index: 36
,
Hongmei Zhang7
Estimated H-index: 7
A new Full-Spectrum Correlated-κ Distribution has been developed, which provides an efficient means for accurate radiative transfer calculations in absorbing/emitting molecular gases. The Full-Spectrum Correlated-κ Distribution can be used together with any desired solution method to solve the radiative transfer equation for a small number of spectral absorption coefficients, followed by numerical quadrature. It is shown that the Weighted-Sum-of-Gray-Gases model is effectively only a crude imple...
Fengshan Liu35
Estimated H-index: 35
(National Research Council),
Gregory J. Smallwood39
Estimated H-index: 39
(National Research Council),
Ömer L. Gülder36
Estimated H-index: 36
(National Research Council)
Abstract The statistical narrow-band correlated- k method was employed to calculate narrow-band intensities along a line-of-sight and radiative transfer in a three-dimensional rectangular enclosure containing nonisothermal CO 2 –H 2 O–N 2 mixtures at 1 atm. The correlated treatment of overlapping narrow bands of CO 2 and H 2 O based on the multiplication property of gas transmissivity significantly increases the execution time of this method at each overlapping band. Three new approximate treatm...
Published on Jan 1, 2001in Combustion and Flame4.12
Jiongming Ruan2
Estimated H-index: 2
(Hirosaki University),
Hideaki Kobayashi29
Estimated H-index: 29
(Tohoku University)
+ 1 AuthorsYiguang Ju3
Estimated H-index: 3
(THU: Tsinghua University)
Abstract The combined effects of non-gray radiation and pressure on the propagation and flammability limits of premixed CH 4 /O 2 /CO 2 flames were investigated numerically at an ambient temperature of 300 K over the pressure range of 0.04–0.50 MPa and the CO 2 dilution range of 0.40–0.79 molar fraction of CO 2 in the oxidant. A statistical narrow-band (SNB) model and an optically thin model (OTM) were used to describe flame radiation heat transfer in conjunction with a detailed chemical mechani...
Published on Jan 1, 2000
Yiguang Ju54
Estimated H-index: 54
(Princeton University),
Chung K. Law1
Estimated H-index: 1
(Princeton University)
+ 1 AuthorsTakashi Nhoka1
Estimated H-index: 1
(Tohoku University)
Unsteady propagation and instability of radiative stretched premixed flames at Lewis numbers close to unity were numerically investigaed using helium-diluted counterflow methane flames, with the interest on understanding the stability of three near-limit and sublimit multiple flame regimes, namely, the near stagnation flame, the weak flame, and the distant flame, It is shown that both the near-limit and sublimit near-stagnation flames are stable close to the flammability limit and that a new mod...
Nicole Jacquinet-Husson8
Estimated H-index: 8
(École Polytechnique),
E. Arié3
Estimated H-index: 3
(University of Paris-Sud)
+ 45 AuthorsA. Chédin41
Estimated H-index: 41
(École Polytechnique)
The current version GEISA-97 of the computer-accessible database system GEISA (Gestion et Etude des Informations Spectroscopiques Atmospheriques: Management and Study of Atmospheric Spectroscopic Information) is described. This catalogue contains 1,346,266 entries. These are spectroscopic parameters required to describe adequately the individual spectral lines belonging to 42 molecules (96 isotopic species) and located between 0 and 22,656 cm-1. The featured molecules are of interest in studies ...
Laurence S. Rothman35
Estimated H-index: 35
(Harvard University),
C. P. Rinsland22
Estimated H-index: 22
(LaRC: Langley Research Center)
+ 17 AuthorsJ.-Y. Mandin22
Estimated H-index: 22
(UPMC: Pierre-and-Marie-Curie University)
Since its first publication in 1973, the HITRAN molecular spectroscopic database has been recognized as the international standard for providing the necessary fundamental spectroscopic parameters for diverse atmospheric and laboratory transmission and radiance calculations. There have been periodic editions of HITRAN over the past decades as the database has been expanded and improved with respect to the molecular species and spectral range covered, the number of parameters included, and the acc...
Published on Jun 1, 1998in Combustion and Flame4.12
Yiguang Ju54
Estimated H-index: 54
(Tohoku University),
Hongsheng Guo7
Estimated H-index: 7
(Tohoku University)
+ 1 AuthorsTakashi Niioka21
Estimated H-index: 21
(Tohoku University)
Abstract Flame bifurcations, extinction, and flammable regions of radiative counterflow premixed flames and the planar propagating flames are investigated numerically with general Lewis numbers. New insights and phenomena are presented by examining the interaction of radiation heat loss, Lewis number effect, and stretch. At a low Lewis number, the results show that for equivalence ratio lower than the standard flammability limit, radiation extinction limit and stretch extinction limit exist, res...
Published on Jun 1, 1998in Combustion Science and Technology1.56
Hongsheng Guo7
Estimated H-index: 7
(Queen's University),
Y. Jub1
Estimated H-index: 1
(Tohoku University)
+ 2 AuthorsFengshan Liu35
Estimated H-index: 35
(National Research Council)
Effects of radiative heat loss on temperatures and extinction characteristics of CH 4 /CO 2 /air and CH 4 /CO 2 /O 2 counterflow premixed flames were numerically investigated by using the detailed chemistry and transport properties with emphasis on assessing the importance of radiation reabsorption. Radiative transfer was calculated using the discrete ordinate method along with the grey gas assumption. Results show that radiation reabsorption has little influence on the temperatures and extincti...
Published on Jan 1, 1998
Yiguang Ju54
Estimated H-index: 54
(Tohoku University),
Goro Masuya19
Estimated H-index: 19
(Tohoku University),
Paul D. Ronney34
Estimated H-index: 34
(SC: University of Southern California)
Premixed gas flames in mixtures of CH 4 , O 2 , N 2 and CO 2 were studied numerically using detailed chemical and radiative emission-absorption models to establish the conditions for which radiatively-induced extinction limits may exist independent of the system dimensions. It was found that reabsorption of emitted radiation led to substantially higher burning velocities and wider extinction limits than calculations using optically-thin radiation models, particularly when CO 2 , a strong absorbe...
Cited By82
Newest
Published on Jan 1, 2020
Ziyu Wang6
Estimated H-index: 6
,
Guangying Yu5
Estimated H-index: 5
,
Hameed Metghalchi17
Estimated H-index: 17
Published on Jan 1, 2020in Fuel5.13
Shixing Wang2
Estimated H-index: 2
(ZJU: Zhejiang University),
Zhihua Wang22
Estimated H-index: 22
(ZJU: Zhejiang University)
+ 4 AuthorsM. Costa28
Estimated H-index: 28
(IST: Instituto Superior Técnico)
Abstract Laminar burning velocities (SL) of CH4/O2/N2 and oxygen-enriched CH4/O2/CO2 flames were measured at elevated pressures up to 0.5 MPa and equivalence ratios ranging from 0.6 to 1.6. The oxygen molar fraction was varied from 0.18 to 0.23 in the O2/N2 mixtures and from 0.31 to 0.42 in the O2/CO2 mixtures. The experimental results showed good agreement with the results reported in previous works, validating the suitability and reliability of the present experimental method for measuring SL ...
Published on Sep 1, 2018in Journal of The Energy Institute3.77
Longkai Xiang2
Estimated H-index: 2
(Anhui University of Technology),
Huaqiang Chu10
Estimated H-index: 10
(Anhui University of Technology)
+ 1 AuthorsMingyan Gu6
Estimated H-index: 6
(Anhui University of Technology)
Abstract The freely-propagating laminar premixed flames of (CH 4 +CO 2 )/air mixtures were calculated with the PREMIX code at various CO 2 contents (0–0.35) and equivalence ratios (0.7–1.3). The chemical reaction mechanism GRI-Mech 3.0 was chosen to determine the effects of CO 2 addition. The chemical effects of CO 2 and the changes of the mole fraction on the important active radicals CH 3 , OH, H and O and the sensitivity of the main reactions contributing to their information were analyzed. T...
Published on Oct 1, 2019in Energy5.54
Du Wang6
Estimated H-index: 6
(Beijing University of Technology),
Changwei Ji24
Estimated H-index: 24
(Beijing University of Technology)
+ 2 AuthorsJinxin Yang12
Estimated H-index: 12
(Beijing University of Technology)
Abstract CO 2 dilution is an effective strategy for combustion control. To understand the detailed dilution effects of CO 2 (including physical effects and chemical effects) on CH 4 and H 2 combustion, an open-source CFD package laminarSMOKE was utilized to simulate the transient one-dimensional outwardly spherical flame combustion process in a closed chamber under 0–15% CO 2 dilution mole fraction ( α ), at 293 K, 1 bar, stoichiometric ratio. The overall CO 2 dilution effects decrease the unstr...
Sai C. Yelishala1
Estimated H-index: 1
(NU: Northeastern University),
Ziyu Wang6
Estimated H-index: 6
(NU: Northeastern University)
+ 3 AuthorsReza Sadr15
Estimated H-index: 15
(Texas A&M University at Qatar)
A. S M Arifur Chowdhury1
Estimated H-index: 1
(UTEP: University of Texas at El Paso),
Asm Arifur Chowdhury1
Estimated H-index: 1
(UTEP: University of Texas at El Paso)
+ 0 AuthorsNorman Love6
Estimated H-index: 6
(UTEP: University of Texas at El Paso)
Published on Jun 1, 2019in Fuel5.13
Roopesh Kumar Mehra4
Estimated H-index: 4
(THU: Tsinghua University),
Hao Duan2
Estimated H-index: 2
(THU: Tsinghua University)
+ 1 AuthorsFanhua Ma18
Estimated H-index: 18
(THU: Tsinghua University)
Abstract The laminar burning velocity of H 2 and CO enriched natural gas (HyCONG) mixtures measured through spherically expanding flames method under three different fuel-air equivalence ratios (0.6, 0.8, and 1.0) at room temperature and atmospheric pressure. Experiments have been conducted into constant volume combustion chamber by using high-speed schlieren photography technique. The five different CO fraction (0%, 20%, 40%, 60%, and 80%) and three HCNG (0%, 20%, and 40%) blends combinations a...
Ahmad Ayache1
Estimated H-index: 1
(UM: University of Manitoba),
Madjid Birouk16
Estimated H-index: 16
(UM: University of Manitoba)
Ziwei Bai1
Estimated H-index: 1
(NCEPU: North China Electric Power University),
Ziyu Wang6
Estimated H-index: 6
(NU: Northeastern University)
+ 2 AuthorsHameed Metghalchi17
Estimated H-index: 17
(NU: Northeastern University)
Published on Dec 1, 2018in Fuel5.13
Pengxiang Wang4
Estimated H-index: 4
(HIT: Harbin Institute of Technology),
Tingting Guo (HIT: Harbin Institute of Technology)+ 4 AuthorsShaozeng Sun15
Estimated H-index: 15
(HIT: Harbin Institute of Technology)
Abstract The effects of H 2 O addition on the CO production by one-dimensional laminar counterflow diffusion flame of H 2 /CO syngas in O 2 /H 2 O = 27.5/72.5 were studied. Davis, Li and the USC II mechanisms are mainly used for the combustion of syngas and a large number of studies have been made on these mechanisms by researchers. However, most of the existing studies were based on the numerical calculation in air condition. Therefore, the existing mechanisms (Davis, Li, USC II) were not suita...