Results 31 to 40 of about 61,190 (204)

Machine learning tabulation of thermochemistry of fuel blends

Applications in Energy and Combustion Science, 2022
The objective of the present work is to develop a machine learning tabulation methodology for thermochemistry that accounts for fuel blends. The approach is based on the hybrid flamelet/random data and multiple multilayer perceptrons (HFRD-MMLP ...
Tianjie Ding, Stelios Rigopoulos, W.P. Jones   +2 more
doaj   +1 more source

Modelling of turbulent hydrogen-blended premixed flames using algebraic flame surface wrinkling closure for the Lewis numbers and mean local burning velocity

Alexandria Engineering Journal, 2022
Hydrogen-blended fuel is of fundamental interest due to difficulties in modelling and its practical significance for the development of high-performance hydrogen combustion devices and safety technologies for the prediction and prevention of fire or ...
Siva PR Muppala
doaj   +1 more source

Impact of Turbulence Intensity and Equivalence Ratio on the Burning Rate of Premixed Methane–Air Flames

Energies, 2011
Direct Numerical Simulations (DNS) have been conducted to study the response of initially laminar spherical premixed methane–air flame kernels to successively higher turbulence intensities at five different equivalence ratios.
Gábor Janiga, Gordon Fru, Dominique Thévenin   +2 more
doaj   +1 more source

Lean blow-off investigation in a linear multi-burner combustor operated in premixed and non-premixed modes

Applications in Energy and Combustion Science, 2022
The flame behaviour and the lean blow-off (LBO) mechanism of a multi-burner linear arrangement of five identical burners each fitted with a central bluff body and a swirler up- stream, operated in either premixed or non-premixed mode, was studied ...
Roberto Ciardiello, Rohit S. Pathania, Ingrid El Helou, Epaminondas Mastorakos   +3 more
doaj   +1 more source

Turbulent partially cracked ammonia/air premixed spherical flames

Fuel Communications
The combustion of ammonia requires, for most energy conversion systems, a combustion promoter such as hydrogen to guarantee the start-up, stability and combustion efficiency.
S. Zitouni, P. Bréquigny, C. Mounaïm-Rousselle   +2 more
doaj   +1 more source

On flame speed enhancement in turbulent premixed hydrogen-air flames during local flame-flame interaction

Combustion and Flame, 2023
Given the need to develop zero-carbon combustors for power and aircraft engine applications, $S_d$ of a turbulent premixed flame, especially for H$_2$-air, is of immediate interest. The present study investigates 3D DNS cases of premixed H$_2$-air turbulent flames at varied pressures for different $Re_t$ and $Ka$ with detailed chemistry to ...
null Yuvraj, Yazdan Naderzadeh Ardebili, Wonsik Song, Hong G. Im, Chung K. Law, Swetaprovo Chaudhuri   +5 more
openaire   +3 more sources

Turbulent Flames Speeds and Laminar Burning Velocities of Dusts using the ISO 1 m³ Dust Explosion Method

Chemical Engineering Transactions, 2014
The ISO 1 m3 dust explosion vessel was instrumented with thermocouples acting as flame detectors. These were used with methane/air gas explosions to show that the explosion flame was spherical in the constant pressure phase of the explosion and that a ...
H. Sattar, G.E. Andrews, H.N. Phylaktou, B.M. Gibbs   +3 more
doaj   +1 more source

Role of pocket formation in the extinction of methane flames subject to strong turbulence

Applications in Energy and Combustion Science
Despite extensive studies of local and global extinction, it remains unclear how local flame dynamics contribute to the global evolution of a turbulent flame at large Karlovitz numbers. Furthermore, the extent to which canonical laminar flame properties,
Patrick A. Meagher, Samuel Calello, III, Xinyu Zhao   +2 more
doaj   +1 more source

Effects of porous insertion in a round-jet burner on flame characteristics of turbulent non-premixed syngas combustion

Case Studies in Thermal Engineering, 2019
Synthesis gas (Syngas) is a gaseous mixture that consists of 3 species. It is used in creating synthetic natural gas. In this work, the turbulent non-premixed flame of syngas-air combustion in a round-jet burner is numerically investigated. The burner is
Santiphong Klayborworn, Watit Pakdee
doaj   +1 more source

Turbulent Flame Geometry Measurements in a Mass-Production Gasoline Direct Injection Engine

Energies, 2020
Direct optical access to the combustion chamber of a gasoline direct injection (GDI) engine provides extremely valuable information about the combustion process.
Manfredi Villani, Phillip Aquino
doaj   +1 more source