Theoretical and Experimental Investigation of NOx Reduction in a CNG Turbocharged Internal Combustion Engines, Ph.D. Dissertation Sharif University of Technology ; Mozaffari, Ali Asghar (Supervisor) ; Hajilouy Benisi, Ali (Supervisor)
Abstract
Combustion and NOx emissions were simulated by quasi-dimensional and ratereaction methods respectively in a turbocharged CNG engine. Mean-value turbulence modeling was carried out during compression and combustion processes to simulate combustion process better. The most appropriate NG flame speed for the CNG turbocharged engine was applied and ignition delay was ended when flame radius became more than turbulence integral length scale. Hemispherical flame propagated from spark gap center and its intersection with reciprocating Mexican-hat piston bowl was calculated analytically. Thermal boundary layer, as a novel approach, was considered in the simulation and a better agreement of predicted...
Cataloging briefTheoretical and Experimental Investigation of NOx Reduction in a CNG Turbocharged Internal Combustion Engines, Ph.D. Dissertation Sharif University of Technology ; Mozaffari, Ali Asghar (Supervisor) ; Hajilouy Benisi, Ali (Supervisor)
Abstract
Combustion and NOx emissions were simulated by quasi-dimensional and ratereaction methods respectively in a turbocharged CNG engine. Mean-value turbulence modeling was carried out during compression and combustion processes to simulate combustion process better. The most appropriate NG flame speed for the CNG turbocharged engine was applied and ignition delay was ended when flame radius became more than turbulence integral length scale. Hemispherical flame propagated from spark gap center and its intersection with reciprocating Mexican-hat piston bowl was calculated analytically. Thermal boundary layer, as a novel approach, was considered in the simulation and a better agreement of predicted...
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