Plenary Lecture

Plenary Lecture

Analysis of Heat Transfer in the Combustion Chamber of an Internal Combustion Engine Using the Thermal Networks

Assoc. Prof. Krisztina Uzuneanu
Thermal Systems and Environmental Engineering Department
“Dunarea de Jos” University of Galati
47 Domneasca street, 800008 Galati, Romania


Abstract: The heat transfer processes in an internal combustion engine can be modeled with a variety of methods. These methods range from simple thermal networks to multidimensional differential equation modeling. Thermal network models, using resistors and capacitors, are very useful for rapid and efficient estimation of conduction, convection and radiation heat transfer processes in engines. Using a thermal network, the significant resistances to heat flow, and the effects of changing material thermal conductivity, thickness, and coolant properties can be easily determined.
The thermal stresses in the cylinder head and in the piston head of an internal combustion engine are determined as a function of the level of temperatures, the temperature difference between different parts and the heat transfer between parts. These further depend on the speed and the way the heat is transferred to the parts, on the part shape, their thermal conductivity and cooling.
Measuring the temperatures in different parts of the cylinder head and the piston head, the cooling can be adjusted or the materials can be improved, or even the properties of the fuels can be improved. We can take into consideration the mixture of a small quantity of alcohol with gasoline in order to reduce the level of temperature.

Brief Biography of the Speaker:
Dr. Krisztina Uzuneanu graduated Faculty of Mechanical Engineering of University “Dunarea de Jos” of Galati in 1984 and she obtained the title of Doctor Engineer in 1998.
Since 1987 she followed the academic carrier at Dunarea de Jos University of Galati as assistant, lecturer and associate professor. Dr. Uzuneanu is a visiting professor at different universities: Universidade do Minho, Portugal, Universita degli Studi di Genova, Italy, Universita degli Studi di Salerno, Italy, Pannon University Veszprem, Hungary, Erciyes University Kayseri, Turkey and visitor scientist of of Universidade do Minho Guimaraes, Portugal where she was awarded with a post-doc NATO grant in 2002 - 2003.
Research fields are connected with applied thermodynamics, alternative fuels for internal combustion engines, modeling the thermal stresses of different parts of internal combustion engines, renewable energy and pollution.
Dr. Uzuneanu published over 100 articles in national and internationals conferences proceedings and she is author of 3 books.
The research work was done as member of 20 research contracts financed by European Commission and Romanian Ministry of Education and Research and director of 5 research contracts financed by industry.
Dr K. Uzuneanu is member of Romanian Society of Thermodynamics since 1990 and member of Balkan Environmental Association since 2011.

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