Results 161 to 170 of about 264,451 (227)

Multiradii modeling of counterflow spray diffusion flames

Proceedings of the Combustion Institute, 2000
A multiradii spray flame model is derived in a kinetic framework in which the droplets' distribution function is taken as a sum of delta products. The droplet class equations are obtained by taking moments of the Boltzmann-type spray equation. The gas-phase equations are coupled to the droplets equations through various integral sources terms.
R. Ben Dakhlia, V. Giovangigli
openaire   +1 more source

Sensitivity of flame structure and flame speed in numerical simulations of laminar aluminum dust counterflow flames

Combustion and Flame, 2022
Jiarui Zhang, Z. Xia, Likun Ma, O. Stein, Yunchao Feng, T. Luu, A. Kronenburg   +6 more
semanticscholar   +1 more source

Determination of laminar flame speeds from nozzle-generated counterflow flames

2008
The accuracy of the counterflow, twin-flame technique for the determination of laminar flame speeds was examined analytically and numerically. The analysis was conducted by using multiple-expansion, high activation energy asymptotics while the numerical simulation incorporated detailed chemistry and transport.
B. H. Chao, F. N. Egolfopoulos
openaire   +1 more source

Combustion of Kerosene in Counterflow Diffusion Flames

Journal of Propulsion and Power, 2001
Numerical modeling has become an essential tool in combustion research as a means of predicting combustion performance and pollutant formation, e.g., NO x and soot. In many combustion models the combustion of a commercial fuel such as kerosene has been represented by single-step empirical expressions. To predict kinetically controlled phenomena, a more
P. M. Patterson, A. G. Kyne, M. Pourkashanian, A. Williams, C. W. Wilson   +4 more
openaire   +1 more source

On the opposing effects of methanol and ethanol addition on PAH and soot formation in ethylene counterflow diffusion flames

Combustion and Flame, 2019
An experimental and numerical analysis of the effects of methanol and ethanol addition on polycyclic aromatic hydrocarbon (PAH) and soot formation in non-premixed ethylene flames is reported here.
Fuwu Yan, Lei Xu, Yu Wang, Sungwook Park, S. Sarathy, Suk Ho Chung   +5 more
semanticscholar   +1 more source

Soot formation in unsteady counterflow diffusion flames

Proceedings of the Combustion Institute, 2009
Abstract The formation of pollutant species in turbulent diffusion flames is strongly affected by the coupling between the highly non-linear chemical kinetics with three-dimensional, unsteady hydrodynamics. It is necessary to better understand this interdependency of transport and kinetic mechanisms, in order to accurately predict non-equilibrium ...
CUOCI, ALBERTO, FRASSOLDATI, ALESSIO, FARAVELLI, TIZIANO, RANZI, ELISEO MARIA   +3 more
openaire   +2 more sources

Flame Synthesis of Carbon Nanotubes in a Rotating Counterflow

Journal of Nanoscience and Nanotechnology, 2009
The synthesis of carbon nanotubes (CNTs) in rotating counterflow diffusion flames using nickel-nitrate coated or uncoated nickel substrates was investigated. A diffusion flame at high angular velocity (low strain rate) is stronger than a weak flame at low angular velocity (high strain rate) and produces more carbon sources because of the longer ...
Shuhn-Shyurng, Hou, De-Hua, Chung, Ta-Hui, Lin   +2 more
openaire   +2 more sources

Aggregate formation in sooting counterflow diffusion flames

Proceedings of the Combustion Institute, 2002
Soot formation is investigated experimentally and numerically in a counterflow diffusion flame which isformed by an acetylene/nitrogen mixture on the fuel side and hot postflame gases of a lean premixed flame on the oxidizer side. The modeling approach uses a detailed chemical mechanism with 453 reactions and 82 species.
C. Pels Leusden, C. Hasse, N. Peters
openaire   +1 more source

Counterflow Diffusion Flames of General Fluids: Oxygen/Hydrogen Mixtures

45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
Abstract A comprehensive framework has been established for studying laminar counterflow diffusion flames for general fluids over the entire regime of thermodynamic states. The model incorporates a unified treatment of fundamental thermodynamic and transport theories into an existing flow solver DMCF to treat detailed chemical kinetic mechanisms and ...
Ribert, Guillaume, Zong, Nan, Yang, Vigor, Pons, Laetitia, Darabiha, Nasser, Candel, Sebastien   +5 more
openaire   +2 more sources

Unsteady counterflowing strained diffusion flames: diffusion-limited frequency response

Journal of Fluid Mechanics, 1996
A detailed numerical study has been conducted on the effect of unsteadiness on the dynamics of counterflowing strained diffusion methane/oxygen/nitrogen flames. The modelling included the solution of the unsteady conservation equations of mass, momentum, energy, and species along the stagnation streamline in an opposed jet using detailed descriptions ...
Egolfopoulos, Fokion N., Campbell, Charles S.   +1 more
openaire   +2 more sources