Diesel Engine Cycle Simulation with a Reduced Set of Modeling Parameters Based on Detailed Kinetics

2009 ◽  
Author(s):  
Michał Pasternak ◽  
Fabian Mauss ◽  
Henry Bensler
Keyword(s):  
Diesel Engine ◽  
Cycle Simulation ◽  
Detailed Kinetics ◽  
Engine Cycle

Flow in the Inlet Manifold of a Production Diesel Engine

1989 ◽  
Vol 203 (1) ◽  
pp. 39-49 ◽  
Author(s):  
C Arcoumanis ◽  
J H Whitelaw ◽  
P Flamang
Keyword(s):  
Diesel Engine ◽  
Laser Doppler Anemometry ◽  
Direct Injection ◽  
Radial Velocities ◽  
Laser Doppler ◽  
Direct Injection Diesel Engine ◽  
Inlet Manifold ◽  
Spatial Locations ◽  
Engine Cycle

The flow in the inlet manifold of a Ford direct injection diesel engine has been characterized by laser Doppler anemometry under motored conditions at engine speeds between 300 and 1100 r/min. Plexiglass windows have been inserted at three locations in adjacent manifold branches of the four-cylinder engine and back-scatter LDA was used to provide information about the ensemble-averaged and in-cycle axial and radial velocities at various spatial locations within the inlet channels during the engine cycle.

Experimental and theoretical study of particulate re-entrainment from the combustion chamber walls of a diesel engine

1997 ◽  
Vol 211 (1) ◽  
pp. 49-57 ◽  
Author(s):  
M Abu-Qudais ◽  
D. B. Kittelson
Keyword(s):  
Particulate Matter ◽  
Diesel Engine ◽  
Combustion Chamber ◽  
Mass Concentration ◽  
High Surface ◽  
Combustion Process ◽  
Surface Shear ◽  
Time Resolved ◽  
Soot Deposition ◽  
Engine Cycle

The purpose of this research was to investigate the influence of the in-cylinder surfaces on the net emission of the particulate matter in the exhaust of a single cylinder, diesel engine. In order to obtain this information, time-resolved sampling was done to characterize the particulate matter emitted in the engine exhaust. A rotating probe sampled the free exhaust plume once each engine cycle. The rotation of the probe was synchronized with the engine cycle in such a way that the samples could be taken at any predetermined crank angle degree window. The sampling probe was designed for isokinetic sampling in order to obtain reliable results. To characterize the exhaust particulate in real time, a filter for mass concentration measurements was used. The results showed about 45 per cent higher mass concentrations as well as particles of larger diameter emitted during blowdown than late in the displacement phase of the exhaust stroke. This suggests that high in-cylinder shear rates and velocities which are associated with the blowdown process, cause the deposited soot to be re-entrained from the surfaces of the combustion chamber, where re-entrainment is favoured by conditions of high surface shear. A mathematical model to predict the amount of soot re-entrained from the cylinder walls is presented. This model is based on information presented in the literature along with the results of the time-resolved measurements of mass concentration. This model supported the hypothesis of soot deposition during the combustion process, with subsequent re-entrainment during the blowdown process of the exhaust stroke.

Study of the Diesel Engine Cycle Variability at LPG Fuelling

2016 ◽  
pp. 371-378
Author(s):  
Liviu Nemoianu ◽  
Alexandru Cernat ◽  
Constantin Pana ◽  
Niculae Negurescu ◽  
Cristian Nutu
Keyword(s):  
Diesel Engine ◽  
Engine Cycle

Development of an advanced turbocharger simulation method for cycle simulation of turbocharged internal combustion engines

2009 ◽  
Vol 223 (5) ◽  
pp. 661-672 ◽  
Author(s):  
W Zhuge ◽  
Y Zhang ◽  
X Zheng ◽  
M Yang ◽  
Y He
Keyword(s):  
Internal Combustion Engines ◽  
Flow Model ◽  
Predictive Accuracy ◽  
Integrated Design ◽  
Simulation Method ◽  
Low Flow ◽  
Model Parameters ◽  
Cycle Simulation ◽  
Cent Error ◽  
Engine Cycle

An advanced turbocharger simulation method for engine cycle simulation was developed on the basis of the compressor two-zone flow model and the turbine mean-line flow model. The method can be used for turbocharger and engine integrated design without turbocharger test maps. The sensitivities of the simulation model parameters on turbocharger simulation were analysed to determine the key modelling parameters. The simulation method was validated against turbocharger test data. Results show that the methods can predict the turbocharger performance with a good accuracy, less than 5 per cent error in general for both the compressor and the turbine. In comparison with the map-based extrapolation methods commonly used in engine cycle simulation tools such as GT-POWER®, the turbocharger simulation method showed significant improvement in predictive accuracy to simulate the turbocharger performance, especially in low-flow and low-operating-speed conditions.

Exhaust System Gas-Dynamics in Internal Combustion Engines

2006 ◽  
Author(s):  
R. Pearson ◽  
M. Bassett ◽  
P. Virr ◽  
S. Lever ◽  
A. Early
Keyword(s):  
Gas Dynamics ◽  
Internal Combustion Engines ◽  
Engine Performance ◽  
Exhaust System ◽  
Combustion Engines ◽  
Cycle Simulation ◽  
Model Following ◽  
Analytical Tools ◽  
Empirical Approaches ◽  
Engine Cycle

The sensitivity of engine performance to gas-dynamic phenomena in the exhaust system has been known for around 100 years but is still relatively poorly understood. The nonlinearity of the wave-propagation behaviour renders simple empirical approaches ineffective, even in a single-cylinder engine. The adoption of analytical tools such as engine-cycle-simulation codes has enabled greater understanding of the tuning mechanisms but for multi-cylinder engines has required the development of accurate models for pipe junctions. The present work examines the propagation of pressure waves through pipe junctions using shock-tube rigs in order to validate a computational model. Following this the effects of exhaust-system gas dynamics on engine performance are discussed using the results from an engine-cycle-simulation program based on the equations of one-dimensional compressible fluid flow.

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