Results 31 to 40 of about 13,935 (250)

Numerical Study on the Required Surrounding Gas Conditions for Stable Autoignition of an Ethanol Spray

open access: yesJournal of Combustion, 2019
This study deals with the development of controlled-ignition technology for high-performance compression ignition alcohol engines. Among the alcohol fuels, we focus on ethanol as it is a promising candidate of alternative fuels replacing petroleum.
Hironori Saitoh   +2 more
doaj   +1 more source

Effect of Pressure, Environment Temperature, Jet Velocity and Nitrogen Dilution on the Liftoff Characteristics of a N2-in-H2 Jet Flame in a Vitiated Co-flow

open access: yesEurasian Chemico-Technological Journal, 2014
The CO2 emission prevention advantage of generating power with high hydrogen content fuels using gas turbines motivates an improved understanding of the ignition behavior of hydrogen in premixed and partially premixed environments.
A. North   +4 more
doaj   +1 more source

Influence of fuel properties on knock under lean combustion conditions

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Internal combustion engines today are required to provide even higher levels of thermal efficiency. Raising the compression ratio and applying lean combustion are effective measures for increasing the thermal efficiency of internal combustion engines ...
Teruhiko OTOKOZAWA   +2 more
doaj   +1 more source

Comprehensive study of autoignition characteristics of propane [PDF]

open access: yesPeerJ Physical Chemistry, 2023
Ignition delay times (IDT) for stoichiometric propane (C3H8) diluted with nitrogen were measured in a shock tube facility under reflected shock wave conditions at pressures ranging from 1 to 10 atm and temperatures between 850 and 1500 K. The experiments
Muhammad Farhan
doaj   +2 more sources

Autoignition Behavior of an Ethanol-Methylcellulose Gel Droplet in a Hot Environment

open access: yesEnergies, 2018
Autoignition of an ethanol-based gel droplet was experimentally investigated by adding 10 wt % of methylcellulose as gellant to liquid ethanol. Experimental studies of the ignition behavior of the gel droplet were found to be quite rare.
Donggi Lee   +3 more
doaj   +1 more source

Impact of engine pressure-temperature trajectory on autoignition for varying fuel properties

open access: yesApplications in Energy and Combustion Science, 2020
The U.S. Department of Energy's Co-Optimization of Engines and Fuels (Co-Optima) initiative is pursuing higher efficiency engines on the basis of fuel properties, and in particular, using fuels that enable multimode combustion strategies that include ...
James P. Szybist, Derek A. Splitter
doaj   +1 more source

Critical autoignition conditions for arbitrary reaction order [PDF]

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2019
In this paper, the theoretical analysis of the critical autoignition conditions for exothermically reacting systems at any value of the reaction order was conducted. The calculated and approximate analytical dependencies for the relationship between the parameters at the ignition limit were obtained.
V. Yu Filimonov, K. B. Koshelev
openaire   +2 more sources

Modelling of Self-Ignition in Spark-Ignition Engine Using Reduced Chemical Kinetics for Gasoline Surrogates

open access: yesFluids, 2019
A numerical and experimental investigation in to the role of gasoline surrogates and their reduced chemical kinetic mechanisms in spark ignition (SI) engine knocking has been carried out.
Ahmed Faraz Khan   +2 more
doaj   +1 more source

Combustion regimes in sequential combustors: Flame propagation and autoignition at elevated temperature and pressure

open access: yes, 2018
This numerical study investigates the combustion modes in the second stage of a sequential combustor at atmospheric and high pressure. The sequential burner (SB) features a mixing section with fuel injection into a hot vitiated crossflow.
Noiray, Nicolas, Schulz, Oliver
core   +1 more source

Autoignition of diesel-like fuels under dual operation with H

open access: yesAdvances in Mechanical Engineering, 2019
The partial replacement of diesel fuel with gaseous fuels in diesel engines allows for reducing soot, increasing the renewable fraction of the fuel and decreasing CO 2 emissions.
Juan J Hernández   +2 more
doaj   +1 more source

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