【作者】 杨波； 孙敏； 白敏菂；

【Author】 YANG Bo;SUN Min;BAI Min-di;Department of Physics, Dalian Maritime University;

【机构】 大连海事大学物理系；

【摘要】 为了进一步提高等离子体流动控制的作用能力,采用α-Al2O3为电介质材料的介质阻挡放电等离子体激励器,进行了在不同来流风速、不同攻角下等离子体抑制NACA0015翼型边界层流动分离的实验研究。烟线流动显示表明等离子体激励可以有效抑制低流速、大攻角下的流动分离;在来流风速为35m/s时,等离子体作用后翼型的失速攻角提高1.5°,等离子体抑制流动分离的效果随着攻角的增加变弱;在攻角为20.5°、来流风速30~44m/s时,等离子体对流动的控制随着来流风速呈现"变弱—增强—变弱"的趋势,等离子体激励器在翼型上的位置非常重要,越接近分离点作用效果最好;来流风速60m/s时,等离子体仍能有效抑制翼型的失速分离,升力增加31.1%,阻力减少27.8%。更多还原

【Abstract】 To further improve the performance of plasma aerodanamic actuator, the plasma flow separation control of NACA0015 airfoil at different free-stream velocities and angle of attack were investigated by dielectric barrier discharge plasma actuator with α-Al2O3 as dielectric matieria. Smokewire flow visualization showed that plasma actuation can effectively suppress the flow separation at low free-stream velocities and high angle of attack. At free-stream velocity of 35m/s, the stall angle was increased by 1.5° with plasma actuation, and the effect of plasma flow seperation control decreased with the increase of the angle of attack. At angle of attack of 20.5° and free-stream velocity of 30~44m/s, plasma flow control showed a trendency of "weakening-enhangcing- weakening" with the increase of the free-stream velocity, so the location of the plasma actuator on the airfoil was found to be crucial for the suppressing flow separation, and better effect will be obtained when the plasma actuator was close to the separation point. The plasma was found to be able to suppress the separated flow at free-stream velocity of 60m/s, with the increase of the lift by 31.1% and the decrease of the drag by 27.8%.更多还原