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What Causes Slower Flame Propagation in the Lean-Combustion Engine?
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous engine data suggest that slower flame propagation in lean-burn engines could be due to slower flame expansion velocity at lean conditions than at stoichiometric combustion. Two classes ...
Three-Dimensional Computations of Flow and Fuel Injection in an Engine Intake Port
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An existing multidimensional in-cylinder flow code, KIVA, was modified to calculate gas flow and fuel injection in a simplified (no valve stem and simplified valve-head geometry) engine intake ...
On the Scaling of Impulsively Started Incompressible Turbulent Round Jets
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A scaling law for transient, turbulent, incompressible, round jets is reported. Numerical solutions of the Navier-Stokes equations were obtained using a k-ε model for turbulence. The constants ...
Effects of Fuel Overpenetration and Overmixing During Ignition-Delay Period on Hydrocarbon Emissions From a Small Open-Chamber Diesel Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A quasi-steady gas-jet model was applied to examine the spray trajectory in swirling flow during the ignition-delay period in an open-chamber diesel engine timed to start combustion at top dead ...
A Mean-Value Model for Control of Homogeneous Charge Compression Ignition (HCCI) Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A Mean Value Model (MVM) for a Homogeneous Charge Compression Ignition (HCCI) engine is presented. Using a phenomenological zero-dimensional approach with five continuous and three discrete states ...