首页|Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators
Airfoil friction drag reduction based on grid-type and super-dense array plasma actuators
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To improve the cruise flight performance of aircraft,two new configurations of plasma actuators(grid-type and super-dense array)were investigated to reduce the turbulent skin friction drag of a low-speed airfoil.The induced jet characteristics of the two actuators in quiescent air were diagnosed with high-speed particle image velocimetry(PIV),and their drag reduction efficiencies were examined under different operating conditions in a wind tunnel.The results showed that the grid-type plasma actuator was capable of producing a wall-normal jet array(peak magnitude:1.07 m/s)similar to that generated in a micro-blowing technique,while the super-dense array plasma actuator created a wavy wall-parallel jet(magnitude:0.94 m/s)due to the discrete spanwise electrostatic forces.Under a comparable electrical power consumption level,the super-dense array plasma actuator array significantly outperformed the grid-type configuration,reducing the total airfoil friction drag by approximately 22％at a free-stream velocity of 20 m/s.The magnitude of drag reduction was proportional to the dimensionless jet velocity ratio(r),and a threshold r=0.014 existed under which little impact on airfoil drag could be discerned.
plasma actuatorflow controldrag reductionairfoil
方子淇、宗豪华、吴云、梁华、苏志
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School of Aerospace Engineering,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China
School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China
National Key Lab of Aerospace Power System and Plasma Technology,Air Force Engineering University,Xi'an 710038,People's Republic of China
国家自然科学基金国家自然科学基金国家自然科学基金Foundation Strengthening Program
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