Bhaskar Aryal - Academia.edu (original) (raw)
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Papers by Bhaskar Aryal
Rentech Symposium Compendium Volume 4, 2014
This paper focuses on the works of designing a small scale wind turbine at arbitrary conditions a... more This paper focuses on the works of designing a small scale wind turbine at arbitrary conditions and analyzing the structural integrity of the model via numerical simulation. The project interests are limited to geometric design of turbine blade, optimization and aerodynamic as well as structural analysis. Design of Horizontal Axis Wind Turbine (HAWT) blade particularly for low wind speed areas is of primary concern to this project. The generation of wind turbine profile is based on Blade Element Momentum theory (BEM). Design parameters like angle of attack, tip speed ratio, aerodynamic coefficients, angle of twist, airfoil profile, chord length are addressed with the aid of this theory. A three dimensional blade is then obtained by extruding the two dimensional airfoil profiles to operate at a rated speed of 5 m/s. Numerical simulations are carried out using a commercial CFD solver ANSYS CFX which reveals the flow structure and aerodynamic characteristics. The results obtained from the combined use of open source software QBlade and CFD computation assure that the 2.5 m long blade made of Polyester resin could withstand extreme loading conditions and provided acceptable performance with regard to stress and deflection produced.
Rentech Symposium Compendium Volume 4, 2014
This paper focuses on the works of designing a small scale wind turbine at arbitrary conditions a... more This paper focuses on the works of designing a small scale wind turbine at arbitrary conditions and analyzing the structural integrity of the model via numerical simulation. The project interests are limited to geometric design of turbine blade, optimization and aerodynamic as well as structural analysis. Design of Horizontal Axis Wind Turbine (HAWT) blade particularly for low wind speed areas is of primary concern to this project. The generation of wind turbine profile is based on Blade Element Momentum theory (BEM). Design parameters like angle of attack, tip speed ratio, aerodynamic coefficients, angle of twist, airfoil profile, chord length are addressed with the aid of this theory. A three dimensional blade is then obtained by extruding the two dimensional airfoil profiles to operate at a rated speed of 5 m/s. Numerical simulations are carried out using a commercial CFD solver ANSYS CFX which reveals the flow structure and aerodynamic characteristics. The results obtained from the combined use of open source software QBlade and CFD computation assure that the 2.5 m long blade made of Polyester resin could withstand extreme loading conditions and provided acceptable performance with regard to stress and deflection produced.