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...

Combustion analysis has been conducted on a small two-stroke glow ignition engine, which has similar combustion characteristics to homogeneous charge compression ignition (HCCI) engines. Difficulties such as unknown ignition timing and the polytropic index have been addressed by combining both heat release and mass fraction burn analyses. Results for all operating conditions have shown good cor...

Ignition is the initial stage of burning the materials. The consequent flame spread over the materials, heat release rate, fire spread across the rooms, and other issues for building fires all depend on that. Numerous studies on the ignition of cellulose materials, especially wood, were reported in the literature. There are smoldering or glowing ignition (self-heating ignition) and flaming igni...

The reduction of pollutant emissions from internal combustion engines, and in particular greenhouse gases, must be achieved by optimizing the process choosing fuels with a low carbon impact. Heterogeneous mixture combustions such as Diesel induce difficulty managing pollutants formation even if its principle output efficiency remains favorable. Therefore, it is necessary to distinguish this las...

-Theoretical and experimental studies dealing with the spray ignition phenomena are reviewed. Two major topics covered are external-source ignition of liquid fuel sprays and spontaneous spray ignition. Experimental and theoretical investigations of external-source ignition of sprays employing different configurations are discussed first. Three major topics included here are: (i) ignition of qui...

The application of hydrogen fuel in ORP engines makes the engine power density much higher than that a reciprocating engine. This paper investigated impacts combustion characteristics, energy loss, and NOx emissions hydrogen-fuelled by ignition timing over various equivalence ratios using simulation approach based on FLUENT code without considering experiments. simulations were conducted under ...

NOx and soot emissions remain critical issues in diesel engines. One method to address these problems is to achieve homogeneous combustion at lower peak temperatures – the goal of research on controlled autoignition. In this paper n-heptane is used to represent a large hydrocarbon fuel and some of the effects of internal and external EGR, oxygen concentration, and engine speed on its combustion...