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Showing papers in "Combustion and Flame in 2017"


Journal ArticleDOI
TL;DR: In this article, the detonations propagating through the annular channel of an optically accessible rotating detonation engine (RDE) operating on hydrogen-air are visualized using OH* chemiluminescence imaging.

274 citations


Journal ArticleDOI
TL;DR: In this article, the authors employed weak flames in a micro flow reactor with a controlled temperature profile, which have been extensively employed to examine ignition characteristics of hydrocarbons, to investigate the characteristics of ammonia/air mixtures at low temperatures.

166 citations


Journal ArticleDOI
TL;DR: In this article, the support from the National Natural Science Foundation of China (No. 91541115) was used to support the work of Wang et al. in the field of bioinformatics.

164 citations


Journal ArticleDOI
TL;DR: In this article, the authors presented work was supported by Saudi Aramco under the FUELCOM program and by the King Abdullah University of Science and Technology (KAUST) with competitive research funding given to the Clean Combustion Research Center (CCRC).

154 citations


Journal ArticleDOI
TL;DR: In this paper, the authors used digital in-line holography (DIH) to experimentally quantify the three-dimensional position, size, and velocity of aluminum particles during combustion of ammonium perchlorate (AP) based solid-rocket propellants.

131 citations


Journal ArticleDOI
TL;DR: In this paper, the effect of different fuel candidates on the operability of gas turbines by comparing a conventional petroleum-based fuel with two other alternative fuel candidates is evaluated, and large-eddy simulations are performed to examine the performance of these fuels on the stable condition close to blowout in a referee gas turbine combustor.

126 citations


Journal ArticleDOI
TL;DR: In this article, the effect of diffraction, shock reflection and detonation instability on the propagation of detonation is examined, and the analysis of critical length scale between the cell size and BR when the detonation fails or succeeds as it passes the obstacles is also performed.

122 citations


Journal ArticleDOI
TL;DR: Different nonintrusive optical and intrusive non optical diagnostic methods are used to measure flame and soot properties in a laminar coflow diffusion flame in order to compare and analyze the sensitivity of each technique to soot particles with different age and morphology as mentioned in this paper.

118 citations


Journal ArticleDOI
TL;DR: Results demonstrate reasonable agreement with experiments, indicating that the SOM-MLP approach provides a good representation of the composition space, while the great savings in CPU time allow for a simulation to be performed with a comprehensive combustion model, such as the LES-PDF, with modest CPU resources such as a workstation.

110 citations


Journal ArticleDOI
TL;DR: In this paper, the role of electron delocalization on low temperature hydrocarbon reactivity and its role in determining octane sensitivity in engine fuel has been investigated for a very wide range of engine fuel types, including n-alkane, 1-olefin, n-alcohol, and nalkyl benzenes.

107 citations


Journal ArticleDOI
TL;DR: In this paper, the compositional effects on polycyclic aromatic hydrocarbons (PAHs) and soot formation were investigated experimentally for gasoline surrogate mixtures comprising n-heptane, iso-octane, and toluene in counterflow diffusion flames.

Journal ArticleDOI
TL;DR: In this paper, the four alcoholic isomers of butanol were added into T20 diesel surrogate (80% n-heptane and 20% toluene in volume) in co-flow partially premixed flames at volumetric fractions of 20% and 40% in order to investigate the effect of adding butanol addition on polycyclic aromatic hydrocarbons (PAHs) and soot formation.

Journal ArticleDOI
TL;DR: In this article, a set of three fuels were designed to hold RON nearly constant (RON = 99.2-100) and to vary S (S = 0, 6.5, and 12).

Journal ArticleDOI
TL;DR: In this paper, the integrated processes of flame acceleration, deflagration-to-detonation transition (DDT), and the resulting detonation propagation in micro- and macro-scale channels are simulated.

Journal ArticleDOI
TL;DR: In this paper, the effect of oxygenated fuel properties on combustion and soot emission was investigated using newly developed chemical mechanisms for various oxygenated fuels such as tri-propylene glycol methyl ether, methyl decanoate, and dimethyl ether.

Journal ArticleDOI
TL;DR: In this paper, the authors analyzed the range from C 6 H 6 to C 16 H 10 in the mass spectra obtained from atmospheric-pressure opposed-flow flames fueled by n- butane, i-butane, and i- butene, with conditions identical to those chosen by Schenk et al.

Journal ArticleDOI
TL;DR: In this article, the effect of bifurcation has been examined in high-speed camera imagery in comparison with more standard methods (e.g., pressure, emission, and laser absorption spectroscopy) to measure the ignition delay time.

Journal ArticleDOI
TL;DR: In this paper, the effects of up to 30% H 2 O and CO 2 replacement of N 2 in air on the structure and shape of laminar coflow syngas (CO H 2 ) diffusion flames were experimentally and numerically studied.

Journal ArticleDOI
TL;DR: In this paper, the authors analytically and computationally examined the transient jet used to ignite combustible mixtures during Turbulent Jet Ignition (TJI) in both the prechamber and the main chamber.

Journal ArticleDOI
TL;DR: In this paper, the soot formation process was investigated in two low pressure premixed methane flames: a reference sooting flame with equivalence ratio 2.32 and a so called nucleation flame with 1.95.

Journal ArticleDOI
TL;DR: In this article, a series of premixed turbulent methane/air jet flames in the thin reaction zone and distributed reaction zone (DRZ) regimes were studied using simultaneous three-scalar high-resolution imaging measurements.

Journal ArticleDOI
TL;DR: In this paper, a spray approach was employed to generate near monodisperse microparticles of Al NPs encapsulated within ammonium perchlorate (AP) and a binder (nitrocellulose).

Journal ArticleDOI
TL;DR: In this paper, an experimental and numerical study was carried out to investigate the combustion process of a kerosene fueled combustor with air throttling, and the results were obtained with the inflow conditions of Mach number of 2.0, total temperature of 953 K and total pressure of 0.82 MPa, respectively.

Journal ArticleDOI
TL;DR: In this article, the authors thank the entire group members at Combustion Chemistry Centre for helpful discussions, which was supported by Saudi Aramco under the FUELCOM program.

Journal ArticleDOI
TL;DR: In this paper, a parametric exploration of the dynamics of ignition using nanosecond pulsed high frequency discharges (NPHFD) in flowing mixtures of methane and air is conducted to determine the "inter-pulse coupling" effect of a burst of high-frequency discharges in the pulse repetition frequency (PRF) range of 1-300 kHz.

Journal ArticleDOI
TL;DR: In this article, the authors used a HAN-based liquid monopropellant, SHP163, as green propellant for green rocket propulsion for the "Innovative Satellite Technology" project.

Journal ArticleDOI
TL;DR: In this paper, the authors measured the flame extension length in the upward and the downward directions under an inclined ceiling of different angles induced by rectangular fire sources with various heat release rates and source-ceiling heights.

Journal ArticleDOI
TL;DR: In this article, a quantitative structure-property relation (QSPR) regression for DCN is demonstrated using the chemical functional group approach, which reveals that the (CH 2 ) n group plays the most significant role in determining the fuel autoignition propensity, followed by the influences of CH 3 and benzyl type groups.

Journal ArticleDOI
TL;DR: In this paper, multiple optical diagnostics are applied to investigate the PPC ignition and flame development in a light-duty optical engine under single-injection condition, and the results indicate that the combustion process of gasoline PPC can be basically divided into four stages: 1) multiple auto-ignition kernels emerging in fuel-rich regions; 2) flame front propagation of the ignition kernels towards fuel-lean regions; 3) auto-indition in the end-gas of fuel lean regions; 4) a “burnout” stage in the whole combustion chamber after

Journal ArticleDOI
TL;DR: In this paper, the effect of different levels of free stream turbulence intensity on the structure of an unconfined, lean propane-air flame stabilized on an axisymmetric bluff body was investigated.