AERODYNAMIC PARAMETER IDENTIFICATION IN THE PROCESS OF AIRFOIL AERODYNAMIC ELASTICITY

In this report ,a low speed airfoil over NACA0012 airfoil at 2° to 7° attack angles with the given inlet velocity of 0.25 m/s was modeled and computational fluid dynamic (CFD) analysis was performed using FLUENT in ANSYS .The Reynolds number based on the chord is roughly Re =6.5E6. The flow was modeled as incompressible and in viscid .All setup and procedures were achieved for 2° attack angle .for 7° attack angle .which is more than the stall angle . mesh independence was not achieved. life and drag coefficient increases as the number of mesh element or the attack angle increases . Computational Fluid Dynamics (CFD) involves the numerical solution of conservation equations for mass, momentum and energy in a flow geometry of interest, together with additional sets of equations reflecting the problem at hand. In this paper the current capabilities of CFD for chemical reactor engineering are illustrated by considering a series of examples from industrial practice. These examples form the basis for the identification of future trends and potential stumbling blocks. Aeroelasticity phenomena involve the study of the interaction between aerodynamic forces and elastic forces (static aeroelasticity), aerodynamic forces, inertia forces and elastic forces (dynamic aeroelasticity), and aerodynamic forces, inertia forces Airfoils Analysis. When the wind turbine is rotating, the airfoils which are part of the blade develop different aerodynamic characteristics each one that is because of the blade twist and the different cords they have. The reason to do an airfoils analysis, is to obtain a pressure an velocity distributions for each airfoil of the blade. Once obtained the airfoil analysis, is possible to know the aerodynamic behavior This process is repeated as many of blade divisions had been chosen by the operator. The reason to do these airfoils analysis is to simulate the aerodynamic behavior. The origin of forced, low frequency oscillations introduced in power systems by low-speed diesel generators is investigated. The linear models of a multimachine power system are presented for both interconnected and autonomous systems. Particular emphasis is given to the calculation of the electromechanical oscillation frequencies. KEY WORDS：CFD, Aeroelasticity, Flutter, Forced Oscillation