Combustion and Flame
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#1Changsheng Bu (Nanjing Normal University)H-Index: 8
#2Alberto Gómez-Barea (University of Seville)H-Index: 28
Last. Guilin Piao (Nanjing Normal University)H-Index: 9
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Abstract Oxy-fuel fluidized bed (FB) combustion is considered one of the promising ways to control CO2 emission from coal-fired power plants. The effect of H2O on the char conversion during wet flue-gas recycle, in which the H2O concentration could be around 40%, is still not well understood. To this end, experiments and modeling were performed in this work. Combustion tests with bituminous coal char were carried out in an electrically heated fluidized bed in O2/CO2, O2/H2O and O2/CO2/H2O for va...
#1Liming Dai (UG: University of Groningen)H-Index: 1
#2Sander Gersen (DNV GL)H-Index: 11
Last. Howard Levinsky (UG: University of Groningen)H-Index: 15
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Abstract Autoignition delay times of NH3/CH4 mixtures with CH4 fractions of 0%, 5%, 10% and 50% were measured in a rapid compression machine at equivalence ratio φ = 0.5, pressures from 20 to 70 bar and temperatures from 930 to 1140 K. In addition, measurements were performed for NH3 mixtures with 10% CH4 at φ = 1.0 and 2.0. Methane shows a strong ignition-enhancing effect on NH3, which levels off at higher CH4 fractions, as the ignition delay time approaches that of pure methane. Autoignition d...
#1Chuan YuanH-Index: 3
#2Ding JiangH-Index: 2
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Abstract In this study, L -rhamnose monohydrate (LRM) was used as a model compound of seaweed polysaccharide to study its pyrolysis and catalytic pyrolysis mechanism. Initially, the weight loss curve of LRM was obtained by thermogravimetric analysis. The main weight loss temperature was found to be at 350–550 °C. Then, the pyrolysis mechanism of LRM was analyzed and verified by macroscopic experiments and molecular simulations. Experiments showed that the bio-oil yield was highest when the tempe...
#1A. S. SavchenkovaH-Index: 2
#2A. S. SemenikhinH-Index: 2
Last. Alexander A. Konnov (Lund University)H-Index: 33
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Abstract The mechanism of the reaction of ketene with hydroxyl radical has been studied by ab initio CCSD(T)-F12/cc-pVQZ-F12//B3LYP/6-311G(d,p) calculations of the potential energy surface. Temperature- and pressure-dependent reaction rate constants have been computed using the RRKM-Master Equation and transition state theory methods in the temperature range of 300–3000 K and in the pressure range of 0.01–100 atm. Three main channels have been analyzed: through direct abstraction of H atoms or s...
#1Xieshang Yuan (USTC: University of Science and Technology of China)H-Index: 2
#2Naian Liu (USTC: University of Science and Technology of China)H-Index: 18
Last. Domingos Xavier Viegas (UC: University of Coimbra)H-Index: 24
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Abstract For the physical model of wildland fire spread, errors or discrepancies in the prediction of spread rate may arise from uncertain, imprecise or improper determinations of the model parameters due to unreasonable assumptions, rough approximations, or inaccurate measurements. In this study, a parametric uncertainty analysis is made on a typical model of upslope fire spread that is consistent with many other models in the framework of the heat transfer theory and the major equations of sub...
#1Zhanbin Lu (SHU: Shanghai University)H-Index: 4
#2Moshe Matalon (UIUC: University of Illinois at Urbana–Champaign)H-Index: 30
Abstract A numerical study is carried out to investigate the stabilization and dynamic properties of the edge flame formed in the wake of two merging streams, one containing fuel and the other oxidizer, separated by a splitter plate. Several plates are considered to illustrate the effects of their thermo-physical properties on the edge flame for low- and high-Lewis-number mixtures. The objective is to provide a comprehensive understanding of the effects of the heat recirculation cycle, from the ...
#1Deepak K. Dalakoti (UNSW: University of New South Wales)H-Index: 1
#2Bruno Savard (UNSW: University of New South Wales)H-Index: 7
Last. John B. Bell (LBNL: Lawrence Berkeley National Laboratory)H-Index: 85
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Abstract We present results from a three-dimensional (3D) direct numerical simulation (DNS) of a spatially developing n-dodecane round jet flame. The thermochemical conditions (i.e. pressure, temperature and oxidiser composition) correspond to those of Spray A, an experimental target flame of the Engine Combustion Network (ECN). To make the DNS computationally tractable, we consider a gas jet with a reduced Reynolds number of 17,000 and a shorter lifted length of 11 times the jet diameter. The f...
#2M. Gatti (Université Paris-Saclay)H-Index: 2
Last. Thierry Schuller (University of Toulouse)H-Index: 3
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Abstract A methodology is developed where the acoustic response of a swirl stabilized flame is obtained from a reduced set of simulations. Building upon previous analytical flame transfer functions, a parametrization of the flame response is first proposed, based on six independent physical parameters: a Strouhal number, the mean flame angle with respect to the main flow direction, the vortical structures convection speed, a swirl intensity parameter, a time delay between acoustic and vortical p...
#1Hyung Sub Sim (PSU: Pennsylvania State University)
#2Richard A. Yetter (PSU: Pennsylvania State University)H-Index: 30
Last. Ilhan A. Aksay (Princeton University)H-Index: 73
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Abstract The decomposition of methylcyclohexane (MCH) containing suspended functionalized graphene sheets (FGS) was studied using a high-pressure flow reactor, under supercritical conditions over the temperature range of 780 – 825 K at a constant pressure of 4.72 MPa. Experiments showed both fuel conversion rates and C1-C2 product yields were increased by 43.3% and 62.1%, respectively, with the addition of 50 ppmw of FGS at 820 K. The reaction mechanisms between hydrocarbon and FGS were computat...
#1Camilo F. Silva (TUM: Technische Universität München)H-Index: 6
Last. M. Ihme
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Abstract Many physical systems are subject to uncertainty in operating regimes, boundary conditions, and physical parameter values. The generalized polynomial chaos (gPC) framework offers methods to represent and propagate uncertainties through the governing equations by means of spectral expansions in random space. The present study combines intrusive gPC with a state-space thermoacoustic model to account for uncertainties in combustion noise prediction of confined flames. The acoustic waves, f...
Top fields of study
Analytical chemistry
Premixed flame
Inorganic chemistry
Diffusion flame