The HCCI combustion process is initiated due to auto-ignition of fuel/air mixture which is dominated by chemical kinetics and therefore fuel composition has a significant effect on engine operation and a detailed reaction mechanism is essential to analysis HCCI combustion. A single zone-model permits to have a detailed chemical kinetics modeling for practical fuels. In this study a single-zone ...

Goaf Frictional Ignition (GFI) poses a serious threat to the safety of underground coal mines, and has caused many underground fires and catastrophic explosions. This paper examined occurrences of GFI incidents and the underlying mechanisms of ignition source and environment. Most of these incidents were attributed to rock on rock frictional ignition. The eventuation of frictional ignition reli...

Homogeneous and inhomogeneous ignition modes of n-heptane were studied using high-speed imaging in a high-pressure shock tube (HPST). n-Heptane, fuel with strong negative temperature coefficient (NTC) behavior, was mixed 4%-21% oxygen argon or nitrogen ignited over wide range (700–1250 K) at elevated pressures (> 10 atm). Ultraviolet (UV) images OH* emission captured through sapphire shock-tube...

Pre-ignition, involving complex interactions of physical and chemical processes, occurs not only in actual combustion engines but also fundamental research equipment such as rapid compression machines shock tubes. Thus, identifying the conditions prone to pre-ignition is critical for interpretation ignition data fuel design. Shock tube experiments with dimethyl ether (DME) were carried out this...

An empirical model for the ignition of aluminum particle clouds is developed and applied to the study of particle ignition and combustion behavior resulting from explosive blast waves. This model incorporates both particle ignition time delay as well as cloud concentration effects on ignition. The total mass of aluminum that burns is found to depend on the model, with shorter ignition delay tim...

The European Union regulations require safety and health protection of workers who are potentially at risk from explosive atmosphere areas. According to the requirements, the operators of installations where potentially explosive atmosphere can occur are obliged to produce an explosion protection document. The key objective of this document is the assessment of explosion risks. This paper is co...