in this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (rcci) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. in rcci strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

In this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (RCCI) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. In RCCI strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

This study examines the possibility to provide control over ignition timing in a homogeneous charge compression engine (HCCI) using fuel additive whose molecular structure can be adapted upon exposure UV light. The molecule has greater influence on retarding than original molecule, hence time modulated expose new is referred as ‘smart fuel’. form of 1,3-cyclohexadiene (CHD), it undergoes electr...

The auto-ignition of toluene and n-heptane as model fuels for Diesel fuel components have been studied in a highpressure shock tube under engine-relevant conditions. Toluene/air and n-heptane/air mixtures as well as toluene/nheptane/air (10/90% and 40/60% by volume) have been investigated over a wide temperature range (700 – 1200 K), = 1.0 and 0.5 and 40 bar behind reflected shock waves. A kine...

A systematic approach for on-the-fly mechanism reduction is proposed in this paper. The approach consists of element flux analysis and dynamic generation of reduced mechanisms during reactive flow computation. At each time step of the computation, a reduced mechanism is generated based on local conditions and no previous information or analysis is necessary. The approach is demonstrated in a pl...

We report experiments and detailed numerical modeling of mixtures of primary reference fuel (PRF) droplets consisting of n -heptane and iso -octane with initial droplet diameters of 0.5 and 3.51 mm. The results show a quasi-steady, low temperature (or “Cool Flame” ( CF )) droplet burning mode that stems from a varying two-stage chemical kinetic behavior of the combustion chemistry. The simulati...

A reduced primary reference fuel (PRF)-alcohol-di-tert-butyl peroxide (DTBP) mechanism with 108 species and 435 reactions, including sub-mechanisms of PRF, methanol, ethanol, DTBP, and the four butanol isomers, is proposed for homogeneous charge compression ignition (HCCI) engine combustion simulations of butanol isomers/nheptane mixtures. HCCI experiments fueled with butanol isomer/n-heptane m...

Premixed or partially premixed compression ignition modes, such as homogeneous charge compression ignition (HCCI), have been a particular focus among researchers because of their potential to deliver enhanced fuel efficiency and meet exhaust emissions mandates without the addition of costly after-treatment technologies as currently required with traditional spark ignition (SI) and direct inject...

Citation: Chang Y, Jia M, Li Y and Xie M (2015) Application of the optimized decoupling methodology for the construction of a skeletal primary reference fuel mechanism focusing on engine-relevant conditions. Front. Mech. Eng. 1:11. doi: 10.3389/fmech.2015.00011 Application of the optimized decoupling methodology for the construction of a skeletal primary reference fuel mechanism focusing on eng...