concern regarding the ef%ciency, stability and safety margins of hi-propellant combustion in rocket engines has prompted the investigation of nlany specific aspects of spray evaporation, ignition and combustion previoudy not studied. Thus, early s!,ucties of combustion in liquid rocket engines were based upon the results of the classsid single-component, isolated drop combustion at atmospheric ...

A sub-millimeter scale catalytic combustor was fabricated. Platinum catalyst coated on a porous ceramics support was placed in the combustion chamber. The chamber, sized 10 10 1:5 mm was covered with a GaAs window which is transparent to infrared radiation. The conversion rate was measured using gas chromatography. The temperature distribution in the combustion chamber was measured with an infr...

Combustion processes generate a band-limited pseudo-random sound that is often referred to as “combustion roar.” Although combustion roar sound is moderately intense but it is rather straight forward to quiet to a non-objectionable level by properly applying sound absorbing material around the burner area. In addition to the 'roar' sound which almost always exists in any confined combustion, on...

This article analyzes the results of a numerical study effect initial injection mass and temperature oxidizer on tridecane (C13H28) combustion process. During research work, KIVA software package was used. Based performed simulation, distribution fuel droplets concentration CO2 were obtained for various values injected liquid in chamber. After analyzing study, it turned out that effective is 9 ...

Ethnomethodology is an established method of research in technology related fields. In work settings, ethnomethodology has helped researchers to deepen their understanding of how collaborative activities unfold in a social context. While much collaboration is now carried out online, through distributed teams for example, ethnomethodology, as a method of analysis, has not received considerable i...

Highly boosted spark ignition engines must confront violent forms of pre-ignition limiting the maximal low-end torque. French research institute IFP presents here an innovative tool allowing a better understanding of this phenomenon and a structured reasoning considering all potential causes of this phenomenon. Advanced statistical analyses of the combustion process and direct visualisations in...

Due to the large contribution of the coldstart process to unburned hydrocarbon emissions of an internal combustion engine during FTP cycle tests, we take a new look at the production of hydrocarbons inside the combustion chamber during coldstart. To this end a model is developed which predicts the exhaust port hydrocarbon concentration, exhaust gas temperature and equivalence ratio based on a s...

This paper deals with the analysis of a set of measurements collected on a lean premixed combustion process operating in a limit cycle. Due to the fact that the data are collected in closed-loop and the system has no external excitation, the identi®cation task is particularly challenging. This work mainly focuses on the issue of the feasibility of the identi®cation task. It will be shown that, ...