Table of Contents
Journal of Thermodynamics
Volume 2012, Article ID 798104, 11 pages
http://dx.doi.org/10.1155/2012/798104
Research Article

Thermodynamic Properties of Real Porous Combustion Reactor under Diesel Engine-Like Conditions

1Institute of Vehicle Technology (IFZN), Faculty of Mechanical Engineering, Georg Simon Ohm University of Applied Sciences, Nuremberg, Kesslerplatz 12, 90489 Nuremberg, Germany
2Faculty of Advanced Technology, University of Glamorgan, Pontypridd CF37 1DL, UK

Received 7 June 2011; Revised 2 November 2011; Accepted 3 November 2011

Academic Editor: L. De Goey

Copyright © 2012 M. Weclas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Thermodynamic conditions of the heat release process under Diesel engine-like conditions in a real porous combustion reactor simulated in a special combustion chamber were analyzed. The same analyses were performed for a free volume combustion chamber, that is, no porous reactor is applied. A common rail Diesel injection system was used for simulation of real engine fuel injection process and mixture formation conditions. The results show that thermodynamic of the heat release process depends on reactor heat capacity, pore density, specific surface area, and pore structure, that is, on heat accumulation in solid phase of porous reactor. In real reactor, the gas temperature and porous reactor temperature are not equal influenced by initial pressure and temperature and by reactor parameters. It was found that the temperature of gas trapped in porous reactor volume during the heat release process is less dependent on air-to-fuel-ratio than that observed for free volume combustion chamber, while the maximum combustion temperature in porous reactor is significantly low. As found this temperature depends on reactor heat capacity, mixture formation conditions and on initial pressure. Qualitative behavior of heat release process in porous reactors and in free volume combustion chamber is similar, also the time scale of the process.