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
E-mail:
kuzuneanu@ugal.ro
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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