Title of article :
Simulation of fouling effects on a two-stage axial turbine performance
Author/Authors :
karrabi, Hadi MAPNA Turbine Engineering and Manufacturing Company (TUGA) , Samaeenia, Ali School of Mechanical Engineering - Hakim Sabzevari University, Sabzevar, Iran , Asgarshamsi, Abolhassan Department of Mechanical Engineering - Golpayegan College of Engineering - Isfahan University of Technology, Golpayegan, Iran , Baghani, Mostafa School of Mechanical Engineering - College of Engineering - University of Tehran, Tehran, Iran
Abstract :
The axial turbine is one of the most important components of
gas turbines in industrial and aerospace applications. As time
passing the increasing of the roughness of the axial turbine
blades is unavoidable. The aim of this paper is numerical
investigation of the blades roughness effects on the flow field
and performance of a two-stage axial gas turbine. In this
research, the axial turbine is simulated three-dimensionally
and the results are validated with experimental data. Then, the
effects of blade roughness on flow field and performance of the
turbine are investigated in five different pressure ratios. Also, in
order to determine the role of stators and rotors roughness in
decreasing the turbine efficiency, in a specific roughness, the
first and second stators and then the corresponding rotors have
been simulated separately. Numerical results show that the
efficiency drop in the turbine stage is approximately equal to
summation of efficiency drops when the roughness effect on the
stator and rotor blades is applied, separately.
Keywords :
The Axial Turbine , Fouling Effects , Roughness Effect , Stator and Rotor Blades
Journal title :
Energy Equipment and Systems
