Fuel-flexible aircraft propulsion systems using compression ignition engines will require novel strategies for reducing the delay of low-reactivity fuels to feasible timescales. Hot surface fuel sprays has been implemented in some practical situations, but complex nature flame formation within spray structure poses significant challenges. In order design next-generation devices, capacity hot he...

The introduction of downsized, turbocharged Gasoline Direct Injection (GDI) engines in the automotive market has led to a rapid increase research on Low-speed Pre-ignition (LSPI) and super-knock as abnormal combustion phenomena within last decade. former is characterized an early ignition fuel–air mixture, primarily initiated by oil–fuel droplet or detached deposit. Meanwhile, occasional develo...

Longer chain alcohols with 4–5 carbon atoms are attractive alternative fuels as they can be derived from biological sources and since their combustion leads to lower exhaust gas levels of NOx soot compared commercial fossil fuels. The auto-ignition behavior that contain both a hydroxyl group C═C double bond in molecular structure is not well established the literature. Understanding influence t...

It is important to understand the low-temperature chemistry of 1-hexene as it used a representative alkene component in gasoline surrogate fuels. Ignition delay times (IDTs) measured rapid compression machines (RCMs) can be validate its chemistry. However, volume history profiles are not available for published RCM IDT data. This has restricted validation at engine-relevant conditions (i.e. low...

in this paper, the amount of wasted heat from different parts of a 12 liter compression ignition engine and their potential for waste heat recovery were investigated. then, two-stage configuration of organic rankine cycle was introduced for simultaneous heat recovery from exhaust gases and coolant. finally, parameters like hybrid generated power, engine thermal efficiency and brake specific fue...

Ignition timing in Homogeneous Charge Compression Ignition (HCCI) engines is dominated by thermo-kinetic reactions that are dependant on the charge properties. A single zone thermodynamic model, coupled to a kinetic mechanism, is developed to predict the ignition timing of Primary Reference Fuels (PRFs) in an HCCI engine. The model, consisting of 120 chemical reactions and 58 species, is valida...

In recent years, the industry has shifted toward down-sizing and turbo-charging spark ignition (SI) engines in an effort to increase fuel conversion efficiency. However, this has given rise to a destructive phenomenon known as sporadic pre-ignition (SPI). At low cranking speeds and high loads, engines have been observed to knock violently for brief and infrequent intervals. If allowed to contin...