The paper analyzes the operations of a small high speed direct injection (HSDI) turbocharged diesel engine by means of a parallel experimental and computational investigation. As far as the numerical approach is concerned, an in-house 1D research code for the simulation of the whole engine system has been enhanced by the introduction of a multizone quasi-dimensional combustion model, tailored for multijet direct injection diesel engines. This model takes into account the most relevant issues of the combustion process: spray development, air-fuel mixing, ignition, and formation of the main pollutant species (nitrogen oxide and particulate). The prediction of the spray basic patterns requires previous knowledge of the fuel injection rate. Since the direct measure of this quantity at each operating condition is not a very practical proceeding, an empirical model has been developed in order to provide reasonably accurate injection laws from a few experimental characteristic curves. The results of the simulation at full load are compared to experiments, showing a good agreement on brake performance and emissions. Furthermore, the combustion model tuned at full load has been applied to the analysis of some operating conditions at partial load, without any change to the calibration parameters. Still, the numerical simulation provided results that qualitatively agree with experiments.
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e-mail: tarcisio.cerri@polimi.it
e-mail: angelo.onorati@polimi.it
e-mail: mattarelli.enrico@unimore.it
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January 2008
Research Papers
1D Engine Simulation of a Small HSDI Diesel Engine Applying a Predictive Combustion Model
T. Cerri,
T. Cerri
Department of Energetics,
e-mail: tarcisio.cerri@polimi.it
Politecnico di Milano
, Via La Masa 34, 20158 Milano, Italy
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A. Onorati,
A. Onorati
Department of Energetics,
e-mail: angelo.onorati@polimi.it
Politecnico di Milano
, Via La Masa 34, 20158 Milano, Italy
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E. Mattarelli
E. Mattarelli
Department of Mechanical and Civil Engineering,
e-mail: mattarelli.enrico@unimore.it
University of Modena and Reggio Emilia
, Via Vignolese 905, 41100 Modena, Italy
Search for other works by this author on:
T. Cerri
Department of Energetics,
Politecnico di Milano
, Via La Masa 34, 20158 Milano, Italye-mail: tarcisio.cerri@polimi.it
A. Onorati
Department of Energetics,
Politecnico di Milano
, Via La Masa 34, 20158 Milano, Italye-mail: angelo.onorati@polimi.it
E. Mattarelli
Department of Mechanical and Civil Engineering,
University of Modena and Reggio Emilia
, Via Vignolese 905, 41100 Modena, Italye-mail: mattarelli.enrico@unimore.it
J. Eng. Gas Turbines Power. Jan 2008, 130(1): 012802 (10 pages)
Published Online: December 26, 2007
Article history
Received:
May 26, 2006
Revised:
April 11, 2007
Published:
December 26, 2007
Citation
Cerri, T., Onorati, A., and Mattarelli, E. (December 26, 2007). "1D Engine Simulation of a Small HSDI Diesel Engine Applying a Predictive Combustion Model." ASME. J. Eng. Gas Turbines Power. January 2008; 130(1): 012802. https://doi.org/10.1115/1.2747258
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