سال انتشار: ۱۳۸۹

محل انتشار: دهمین همایش انجمن هوافضای ایران

تعداد صفحات: ۷

نویسنده(ها):

Gholamali Atefi – Associate Professor of Mechanical Engineering Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16844, Iran
Mohammad Medhi Jafari – PhD. Student of Mechanical Engineering
Javad Khalesi – MSc. of Mechanical Engineering Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16844, Iran
Afsaneh Soleimani4 – MSc. of Mechanical Engineering Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16844, Iran

چکیده:

In some problems, the stress solution depends on a thermal solution without the inverse dependency. That means stress has no effect on the heat transfer solution. In current research the pure heat transfer problem has been solved as a predefined field for the purpose of stress analysis for a turbine blade with cooling. Since the blade is subjected to a hot pressurized flow which forces the rotor to rotate at its required speed therefore, the created stress by forces lead to fraction and corrosion on the blade. In this paper, temperature and stresses fields in a gas turbine rotor are investigated using finite element method (FEM). According to the complexity of the geometry, a two dimensional modeling of a group of blade is created using a commercial CAD software. The details of this new approach are presented while stresses developed due to the turbine operating conditions at high rotational speed and thermal gradient by taking into account the material behavior at elevated temperatures K(T), E(T), α(T).Finally, these results compared with the results of the material behavior at constant properties. The results of blade with constant material properties have a good agreement with experimental results