Data-driven chemical kinetic reaction mechanism for F-24 jet fuel ignition

Effect of hydrogen enrichment on the laminar burning characteristics of dimethyl-ether/methane fuel: Experimental and modeling study

Ignition Enhancement of F-24 Jet Fuel by a Hot Surface for Aircraft Propulsion Systems

Biodiesel combustion in diesel engines is associated with reduced carbon monoxide, particulate matter and unburned hydrocarbons emissions, but several concerns remain including carbon deposition, low thermal efficiency and elevated nitrogen oxides production. To this end, the incorporation of gasoline additive has been proposed as a solution to the drawbacks posed by biodiesel. Integrated chemical kinetics-computational fluid dynamics combustion modelling is a widely used tool to understand the combustion characteristics of new fuel mixtures. This study provides a thorough review of the advances gained in the field of combustion modelling for gasoline-biodiesel mixtures. A thorough appraisal of gasoline surrogate mechanisms such as the primary reference fuel, toluene primary reference fuel and multi-component mechanisms is presented. Developments in the biodiesel surrogate mechanisms such as methyl-butanoate, methyl-hexanoate, methyl-heptanoate, methyl-octanoate, and methyl-decanoate are also discussed. Furthermore, this study also presents a wide-reaching analysis of the modelling results looking into the effects of gasoline addition on the combustion characteristics of gasoline-biodiesel mixtures. From the modelling studies reviewed, the addition of gasoline brings about an increase in the ignition delay timing, in-cylinder pressure and heat release rate (at high temperatures). Also, the rise in gasoline fraction (at low temperatures) leads to the reduction in the combustion duration, nitrogen oxides and soot emissions, but increased carbon monoxide and hydrocarbons emissions. Finally, increased gasoline fraction improves the fuelling economy (at high temperatures) and the combustion stability (at low temperatures). 

Review of the advances in integrated chemical kinetics-computational fluid dynamics combustion modelling studies of gasoline-biodiesel mixtures

Effect of hot probe temperature on ignition of alcohol-to-jet (Atj) fuel spray under aircraft propulsion system conditions

Flame propagation commonly exists in a wide range of engine operating modes. In chemical kinetic model reduction, the prediction of flame speeds must be targeted when engines involve flame propagation. However, the time-consuming nature of 1-D flame code running largely limits the feasibility of trial-and-error type reduction approaches. In this study, an improved automatic reduction scheme is proposed by adding a normalized H radical sensitivity with rate constants. By comparison with flame speed sensitivity, the combination of H radical and flame speed sensitivity can be more accurate to construct the species group relevant to laminar flame chemistry. Then, the newly proposed reduction methodology is applied for the spark ignition-controlled autoignition hybrid combustion (SCHC) with dimethyl ether (DME) as the pilot injection into gasoline, which proves promising in the engine performance by flexible controlling and stabilizing the combustion process. By constructing a new detailed chemical kinetic mod...

H Radical Sensitivity-Assisted Automatic Chemical Kinetic Model Reduction for Laminar Flame Chemistry Retaining: A Case Study of Gasoline–DME Mixture under Engine Conditions

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H Radical Sensitivity-Assisted Automatic Chemical Kinetic Model Reduction for Laminar Flame Chemistry Retaining: A Case Study of Gasoline–DME Mixture under Engine Conditions