Results 61 to 70 of about 1,995,636 (179)
A comparative study of different reaction models for turbulent methanehydrogenair combustion
Journal of Thermal Engineering, 2015 Reaction modelling of methane/hydrogen combustion has two important aspects. First, such mixtures may be used in future in combustion devices like gas turbines and gas engines in the frame of the demand for efficient energy storage systems, where the ...
S. Muppala, B. Manickam, F. Dinkelacker
doaj +1 more source
Scaling transition of turbulent flame speed for thermodiffusively unstable flames
Physics of FluidsThis work presents an experimental set of Bunsen flames characterized by a moderate Reynolds number and a variable turbulence intensity. Ten lean hydrogen-enriched methane–air mixtures at three turbulence levels are investigated, ranging from methane–air to hydrogen–air mixtures. Such mixtures are selected to have an almost constant laminar flame speed
Guido Troiani +3 more
openaire +2 more sources
Compressible Turbulent Flame Speed of Highly Turbulent Standing Flames [PDF]
, 2018 This work presents the first measurement of turbulent burning velocities of a highly-turbulent compressible standing flame induced by shock-driven turbulence in a Turbulent Shock Tube.
Sosa, Jonathan
core
Triple flame structure and diffusion flame stabilization [PDF]
, 1994 The stabilization of diffusion ñames is studied using asymptotic techniques and numerical tools. The configuration studied corresponda to parallel streams of cold oxidizer and fuel initially separated by a splitter píate.
Poinsot, T. +5 more
core
Flame Annihilation Displacement Speed and Stretch Rate in Turbulent Premixed Flames
Flow, Turbulence and Combustion, 2019 This paper examines the dynamics of flame annihilation in turbulent premixed flames using a DNS dataset of Haghiri et al. (J. Fluid Mech. 843, 29 2018). Two theoretical frameworks are considered. The relative contributions of the reaction rate, normal diffusion and flame curvature to the flame displacement speed are first considered.
Haghiri, A +3 more
openaire +2 more sources
Fluids, 2019 Boundary layer flashback from the combustion chamber into the premixing section is a threat associated with the premixed combustion of hydrogen-containing fuels in gas turbines. In this study, the effect of pressure on the confined flashback behaviour of
Aaron Endres, Thomas Sattelmayer
doaj +1 more source
Experimental study on premixed flame acceleration in closed pipe [PDF]
, 2013 An experimental study has been carried out to investigate the flame acceleration in closed pipe. A horizontal steel pipe, with 2 m long and 0.1 m diameter, giving length to diameter (L/D) ratio of 20 was used in this project.
M. Kasmani, R. +2 more
core +1 more source
Results in EngineeringThis study experimentally investigates the turbulent flame speeds (St) of Gas-to-Liquids (GTL) fuel and a 50/50 blend with diesel across turbulence intensities (u') ranging from 0.5 to 3.0 m/s and equivalence ratios (Φ) from 0.7 to 1.3.
Abdellatif M. Sadeq +2 more
doaj +1 more source
Topology and flame speeds of turbulent premixed flame kernels in supersonic flows
Combustion and Flame, 2019 Abstract Premixed flame kernels exposed to a mean expanding supersonic channel flow are examined using experiments and large-eddy simulations. Four cases, spanning three Mach numbers and two equivalence ratios, are explored. Numerical results are processed similarly to and compared with experimental data.
Bradley A. Ochs +3 more
openaire +2 more sources
Journal of Thermal Science and Technology, 2006 The laminar burning velocity of pre-mixed hydrogen-air mixtures was measured in a fan stirred combustion bomb. Unstretched laminar burning velocities and Markstein lengths were obtained at 0.10MPa for equivalence ratios of 0.4, 0.6, 0.8 and 1.0 using ...
Andrew SMALLBONE +2 more
doaj +1 more source