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Prediction of Homogeneos Charge Compression Ignition (HCCI) Engines Performance Using Multi-Zone Model
, M.Sc. Thesis Sharif University of Technology ; Mozafari, Ali Asghar (Supervisor)
Abstract
Some researches have been carried out in the last 20 years in order to increase the present IC engines thermal efficiency and their optimum performance. (HCCI) engine is viewed as a combination of spark-ignition (SI) and compression-ignition (CI) engines. This is because HCCI engines use premixed fuel/air mixture like SI engines and have auto ignition combustion after the mixture is compressed like CI engines. Control of combustion and ignition timing are the main challenges of these engines. Ignition delay, compression ratio, fuel air equivalence ratio and intake temperature and pressure are considered to be the most effective parameters on HCCI combustion.HCCI engines have great potentials...
Investigation of Thermodynamics Parameters on Flameless Combustion in Semi-Industrial Fixed Burners
, M.Sc. Thesis Sharif University of Technology ; Saeedi, Mohammad Hassan (Supervisor)
Abstract
Flameless or Moderate and Intense Low-oxygen Dilution (MILD) combustion represents a promising advancement in combustion technology, offering enhanced efficiency and significant reductions in pollutant emissions. This is achieved through the expansion of the reaction zone, uniform temperature distribution, elimination of hot spots, reduced oxygen concentration, and recirculation of flue gases. While extensive research has been conducted on flameless combustion and its influencing parameters, the majority of experimental and numerical studies have been limited to lab-scale conditions. Comprehensive investigations into the scale-up of flameless combustion systems remain scarce. In this study,...