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RISS 인기검색어
- 검색키워드
- 저자 : Phan Minh Khang (검색결과 1 건)
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Simulation of Unsteady Flow Actuation Produced by Surface Plasma Actuator on 2-D Airfoil
Phan Minh Khang 울산대학교 자동차선박기술대학원 2015 국내석사
Effect of flow actuation driven by low current DC surface glow discharge plasma actuator is studied numerically by using OPENFOAM. Numerical model of the source of flow actuation is obtained by physical modeling of ion pressure rise created in DC plasma sheath near the cathode. Modeled plasma flow actuator is tested with NACA0012 airfoil in order to demonstrate the actuation effect in low speed flows. Dynamic situation of the airfoil is obtained by rotating the airfoil within a certain range of angle of attack at a specific rotating speed. In order to simulate the motion of oscillating airfoil, computational domain is split into two parts; far field and near the airfoil. Sliding mesh is applied to a circular domain near the airfoil. To simulate unsteady plasma actuator, plasma actuator is added in Navier Stocke’s equation in term of body force. Simulated plasma actuator is placed on the upper surface of the airfoil at different positions. As the angle of attack changes, flow around the airfoil produces various drag and lift force and dynamic stall may happen. By changing actuation authority according to the change in angle of attach, stabilization of unsteady flow field is achieved and hence constant aerodynamic performance is maintained. The relevant relationship between frequency of plasma actuator and reduced frequency is investigated.
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