A NOVEL CONCEPT ON THE PLASMA GURNEY FLAP
A NOVEL CONCEPT ON THE PLASMA GURNEY FLAP
复制标题
等离子轮床襟翼的新颖概念
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Choi
中科院分区：
文献类型：
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作者：
Lihao Feng;Jinjun Wang;K. Choi
利用介质阻挡放电(DBD)等离子体激励器对机械Gurney襟翼的升力增量功能进行了模拟实验。提出了三种不同的等离子体Gurney瓣。对于配置1和2，将两个DBD等离子体致动器放置在翼型后缘附近的压力(下)表面上，以产生壁法向射流，从第二个电极的下游边缘到翼型后缘的距离分别为1 mm和0。对于配置3，只有一个DBD等离子体激励器被放置在翼型压力表面上，以产生与自由流相反的水平壁射流。测力结果表明，构型3对升力系数的改善最为显著，而构型1对气动力影响不大。PIV测量表明，构型3诱导的翼型绕流结构与机械Gurney襟翼诱导的绕流结构相似，说明它们的增升机理相似。
An experiment is conducted to simulate the lift increment function of the mechanical Gurney flaps by the dielectric barrier discharge (DBD) plasma actuators, which is named as the plasma Gurney flap. Three different kinds of the plasma Gurney flap have been proposed. For configurations 1 and 2, two DBD plasma actuators are placed onto the pressure (lower) surface of the airfoil near the trailing edge to produce a wall-normal jet, with a distance from the downstream edge of the second electrode to the airfoil trailing edge 1 mm and zero, respectively. For configuration 3, only one DBD plasma actuator is positioned onto the airfoil pressure surface to produce a horizontal wall jet opposite to the free stream. The force measurement indicates that the configuration 3 can most significantly improve the lift coefficient, while configuration 1 has little influence on the aerodynamic forces. The PIV measurement indicates that the flow topology around the airfoil induced by the configuration 3 is similar to that induced by the mechanical Gurney flap, suggesting a similarity in their liftincrement mechanism.