Results 201 to 210 of about 13,935 (250)

The use of partial fuel stratification to enable stable ultra-lean deflagration-based Spark-Ignition engine operation with controlled end-gas autoignition of gasoline and E85

, 2020
Lean operation of Spark-Ignition engines can provide higher thermal efficiency compared to standard stoichiometric operation. However, for a homogeneous lean mixture, the associated reduction of flame speeds becomes an important issue from the ...
Zongjie Hu, Junjie Zhang, Magnus Sjöberg, Weizhen Zeng   +3 more
semanticscholar   +1 more source

Turbulent deflagrations, autoignitions, and detonations

Combustion, Explosion, and Shock Waves, 2012
Measurements of turbulent burning velocities in fan-stirred explosion bombs show an initial linear increase with the fan speed and RMS turbulent velocity. The line then bends over to form a plateau of high values around the maximum attainable burning velocity.
Bradley, Derek, Lawes, Malcolm, Mansour, Morkous S.   +2 more
openaire   +2 more sources

Autoignition in methanehydrogen mixtures

Combustion and Flame, 1984
Abstract Induction time and strong ignition limit associated with autoignition are determined experimentally for 11 mixtures of methanehydrogenoxygen using the reflected shock technique. The experimental conditions cover temperatures from 800 to 2400K and pressures from 1 to 3 atm. The induction time data, τ, obtained for the methaneoxygen and the
R.K. Cheng, A.K. Oppenheim
openaire   +1 more source

Elementary radical reactions and autoignition

Journal of the Chemical Society, Faraday Transactions, 1995
The kinetics of the elementary reactions involved in the low-temperature combustion of alkanes are reviewed. The reactions are centred on the alkyl radical and its decomposition, recombination and reactions with O2. A combination of theory, modelling and direct measurements, using especially laser flash photolysis, have played key roles in the ...
Michael J. Pilling, Struan H. Robertson, Paul W. Seakins   +2 more
openaire   +1 more source

Autoignition Dynamics of N-dodecane Droplets under Normal Gravity

Combustion Science and Technology, 2020
Experimental observations of two-stage autoignition dynamics of fiber-supported normal dodecane droplets in air under normal gravity are presented for a range of pressures and temperatures.
E. N. Rose, V. Nayagam, D. Dietrich, M. Hicks, U. Hegde, Rosa E. Padilla, F. Williams   +6 more
semanticscholar   +1 more source

On Autoignition of Co-Flow Laminar Jets

SIAM Journal on Applied Mathematics, 2016
The authors analyze a mathematical model accounting for the thermal runaway followed by ignition in laminar jets. After a change of variables and unknowns through an adimensionalization process, they consider the system of parabolic equations \(\theta _{\zeta }=\theta _{\xi \xi }+\frac{1}{\xi } \theta _{\xi }\) for \((\xi ,\zeta )\in (0,\lambda )\times
Gordon, Peter V., Hegde, Uday G., Hicks, Michael C., Kulis, Michael J.   +3 more
openaire   +2 more sources

On autoignition-dominated supersonic combustion

45th AIAA Fluid Dynamics Conference, 2015
Supersonic combustion in hydrocarbon-fueled scramjets, in the lower limits of hypersonic flight Mach numbers, is expected to occur as autoignition-dominated distributed reactions. At relevant conditions, including leading to autoignition is not well-captured by detailed chemical-kinetic models at present.
Cymbalist, Niccolo, Dimotakis, Paul
openaire   +2 more sources

Autoignition, knock, detonation and the octane rating of hydrogen

Fuel, 2023
F. Poursadegh, M. Brear, Barnaby Hayward, Yi Yang   +3 more
semanticscholar   +1 more source

Experimental and modeling validation of a large diesel surrogate: Autoignition in heated rapid compression machine and oxidation in flow reactor

Combustion and Flame, 2019
Autoignition and oxidation characteristics of a three-component diesel surrogate fuel were studied in a heated rapid compression machine (RCM) and a flow reactor (FR) over a wide range of conditions.
Liang Yu, Yebing Mao, Ang Li, Sixu Wang, Y. Qiu, Yong Qian, D. Han, Lei Zhu, Xingcai Lu   +8 more
semanticscholar   +1 more source

Simulation of Spray Autoignition Introducing “Spraylets”

Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2012
Spray ignition is a complex combination of physical and chemical processes. Therefore there is no way to simulate all processes without significant simplifications. Dynamic and thermal effects of droplets in a two phase flow are respected through averaged properties of mass, momentum and energy.
Konstantin Klinkov, Christian Eigenbrod, Frank Giese, Peter Rickmers, Manfredo Reimert   +4 more
openaire   +1 more source