Proceedings ArticleDOI
Phenomenological combustion model for a quiescent chamber diesel engine
J. C. Dent,Pramod S. Mehta +1 more
- Vol. 811235
TLDR
In this article, a phenomenological model is presented for prediction of the combustion characteristics of a quiescent chamber diesel engine, and the major physical processes controlling combustion have been characterized, and dominant role of air entrainment and turbulent mixing confirmed quantitatively.Abstract:
A phenomenological model is presented for prediction of the combustion characteristics of a quiescent chamber diesel engine. Predictions with the model have shown acceptable agreement with a range of experimental data. The major physical processes controlling combustion have been characterized, and the dominant role of air entrainment and turbulent mixing confirmed quantitatively. 45 refs.read more
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Proceedings ArticleDOI
Multi-Zone DI Diesel Spray Combustion Model for Cycle Simulation Studies of Engine Performance and Emissions
Dohoy Jung,Dennis N. Assanis +1 more
Abstract: A quasi -dimensional, multi-zone, direct injection (DI) diesel combustion model has been developed and implemented in a full cycle simulation of a turbocharged engine. The combustion model accounts for transient fuel spray evolution, fuel-air mixing, ignition, combustion and NO and soot pollutant formation. In the model, the fuel spray is divided into a number of zones, which are treated as open systems. While mass and energy equations are solved for each zone, a simplified momentum conservation equation is used to ca lculate the amount of air entrained into each zone. Details of the DI spray, combustion model and its implementation into the cycle simulation of Assanis and Heywood [1] are described in this paper. The model is validated with experimental data obtained in a constant volume chamber and engines. First, predictions of spray penetration and spray angle are validated against measurements in a pressurized constant volume chamber. Subsequently, predictions of heat release rate, as well as NO and soot emissions are compared with experimental data obtained from representative heavy-duty, turbocharged diesel engines. It is demonstrated that the model can predict the rate of heat release and engine performance with high fidelity. However, additional effort is require d to enhance the fidelity of NO and soot predictions across a wide range of operating conditions.
Journal ArticleDOI
Theoretical modeling and experimental studies on biodiesel-fueled engine
TL;DR: In this article, a two-step trans-esterification process was developed for the production of methyl-esters of rubber seed oil, and the performance of a C.I. engine using biodiesel and its blends with diesel (B20 and B100) as fuel.
Proceedings ArticleDOI
The Effect of Injection Parameters and Swirl on Diesel Combustion with High Pressure Fuel Injection
Journal ArticleDOI
Effect of biodiesel, biodiesel binary blends, hydrogenated biodiesel and injection parameters on NOx and soot emissions in a turbocharged diesel engine
S. Rajkumar,J. Thangaraja +1 more
TL;DR: In this paper, the effect of start of injection, fuel formulation, and blends of biodiesel fuels on the emission characteristics of diesel fuel has been investigated and validated with the experimental results at a wide range of speed and load conditions.
References
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Proceedings ArticleDOI
A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine
Journal ArticleDOI
Measurements of entrainment by axisymmetrical turbulent jets
F. P. Ricou,D. B. Spalding +1 more
TL;DR: In this article, a new technique is described for measuring the axial mass flow rate in the turbulent jet formed when a gas in injected into a reservoir of stagnant air at uniform pressure.
Models for combustion and formation of nitric oxide and soot in direct injection diesel engines. SAE Paper 760129
H. Hiroyasu,T. Kadota +1 more
TL;DR: In this paper, a mathematical model was developed for predicting the concentration of exhaust nitric oxide, soot and other emissions in a direct injection diesel engine, based on the knowledges concerning a single droplet as well as the droplet size distribution in a fuel spray and the spatial and temporal distribution histories of fuel in a combustion chamber.