Numerical Investigation of Exergy Loss of Ammonia Addition in Hydrocarbon Diffusion Flames
Entropy, 2022 In this paper, a theoretical numerical analysis of the thermodynamics second law in ammonia/ethylene counter-flow diffusion flames is carried out. The combustion process, which includes heat and mass transfer, as well as a chemical reaction, is simulated
Haifeng Sun +4 more
doaj +1 more source
Analysis of Micro-scale Flame Structure of AP/HTPB Base Bleed Propellant Combustion [PDF]
, 2013 A complex multiple flame structure is formed during the combustion of AP/HTPB base bleed propellant. The AP monopropellant flame is concentrated in a thin zone above the burning surface of AP crystal to maintain self-sustained decomposition.
Cao, Yong-jie, Ye, Rui, Yu, Yong-gang
core +1 more source
Impact of the Nozzle Angles on Counterflow Diffusion Flame to Strain Rate Variations [PDF]
, 2016 The Diffusion laminar combustion of liquefied petroleum gas (LPG) and air is studied experimentally using counterflowing axisymmetric jets. Attributes of this type of burner arrangement for studying laminar combustion are discussed in terms of flame ...
Abass, P. J. (Prof) +4 more
core +1 more source
Multicomponent Fuel Diffusion Flames: Flame Structure for Coupled Diffusion-Flame and Premixed-Flame Burning Regimes [PDF]
43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005 The analysis addresses some aspects of the extinction and the structure of diusion flames established by burning of two fuels. This analysis is asymptotically performed presuming one-global-step chemical reactions with large activation energies. By working with fuels with dierent activation energies, the structure is composed by two zones with dierent ...
openaire +2 more sources
Turbulent burning velocity and thermo-diffusive instability of premixed flames [PDF]
arXiv, 2023 Reported in the paper are results of unsteady three-dimensional direct numerical simulations of laminar and turbulent, lean hydrogen-air, complex-chemistry flames propagating in forced turbulence in a box. To explore the eventual influence of thermo-diffusive instability of laminar flames on turbulent burning velocity, (i) a critical length scale ...
arxiv
Model constant C of turbulent NO reaction time model
Case Studies in Thermal Engineering, 2017 The NO concentration of turbulent jet flames with different fuel, jet velocity, and jet diameter are simulated with the turbulent NO reaction time model. The predicted NO profile has very good agreement with the experimental data.
Qiong Li, Yuexinzhu Lan, Peiyong Wang
doaj +1 more source
FGM modeling considering preferential diffusion, flame stretch, and non-adiabatic effects for hydrogen-air premixed flame wall flashback [PDF]
Combust.Flame 269 (2024) 113718Preferential diffusion plays an important role especially in hydrogen flames. Flame stretch significantly affects the flame structure and induces preferential diffusion. A problematic phenomenon occurring in real combustion devices is flashback, which is influenced by non-adiabatic effects, such as wall heat loss.
arxiv +1 more source
Regularization modeling for large-eddy simulation of diffusion flames [PDF]
, 2006 We analyze the evolution of a diffusion flame in a turbulent mixing layer using large-eddy simulation. The large-eddy simulation includes Leray regularization of the convective transport and approximate inverse filtering to represent the chemical source ...
Geurts, Bernard J.
core +1 more source
Type Ia Supernova: Burning and Detonation in the Distributed Regime
, 2007 A simple, semi-analytic representation is developed for nuclear burning in Type Ia supernovae in the special case where turbulent eddies completely disrupt the flame. The speed and width of the ``distributed'' flame front are derived.
Damkohler G., Ropke F., S. E. Woosley
core +1 more source
Near-limit H$_2$-O$_2$-N$_2$ combustion in nonpremixed counterflow mixing layers [PDF]
Combust. Flame (2020) 216, 426-438Numerical computations employing detailed chemistry are used to characterize the different combustion modes emerging in mixing layers separating nitrogen-diluted counterflowing planar streams of hydrogen and oxygen. Attention is focused on high degrees of dilution, resulting in near-limit flames, with peak temperatures close to the crossover ...
arxiv +1 more source