Numerical Simulation of Body Force Field Effects on Separation Control over Airfoils

Numerical Simulation of Body Force Field Effects on Separation Control over Airfoils

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Part of #Numerical Simulation of Body Force Field Effects on Separation Control over Airfoils# :

Publishing year : 2008

Conference : Sixteenth Annual Conference of Mechanical Engineering

Number of pages : 8

Abstract: Among All Active flow control methods, EHD, MHD and EMHD are the only methods that operate on the basis of body force induction on the flow field. The EHD plasma actuator is the proper method that has been recently used in various separation control applications. In this paper, we have studied the effects of different body forces which act on a different domain of flow field for separation control on NACA 0021. The airflow
Velocity is 35 m / s at a post-stall angle of attack of 23 degrees. Three different domains have been used as body force field acting domains. The body forces are different in strength and direction. By simulations, body forces which give the best results in the vanishing of separation
are obtained. We have obtained the relation between electric and viscous forces (b A number), and the relation between electric and inertial forces (c D number), using non-dimensional analysis. It has been shown that Hartmann number and Stuart number in MHD play the same role as
b A and c D numbers in EHD. We have defined bA and c D numbers for EHD plasma actuators to show their efficiency in different flow control applications.