中-大迎角下圆锥前体流场的等离子体控制

Plasma flow control over conical fore-body at moderate-high angles of attack

在圆锥-圆柱组合体圆锥段的尖端区域布置一对单个介质阻挡放电激励器(SDBD),通过风洞实验对圆锥前体分离涡流场的等离子体控制特性进行了研究。实验风速5m/s,迎角为25°和30°,采用表面压力测量技术,并通过对压力的积分得到侧向力系数。实验结果表明:通过控制激励器的开、关可以改变圆锥两侧压力分布不对称的模式,从而使得侧向力的大小和方向发生改变。研究表明:等离子体激励器可以对非双稳态下的圆锥前体分离涡流场进行有效的控制。

A pair of single-dielectric barrier discharge （SDBD） plasma actuator was placed near the nose of the cone cylinder, and wind tunnel tests were performed to study the control effect of plasma actuators. The tests were carried out under the wind speed of 5m/s and at the an- gles of attack of 25° and 30° . The results consist of measurements of circumferential static pres- sure distributions. The overall side forces over the cone are calculated from the measured pres- sures. The test results show that the side force over the cone-cylinder model can be manipulated by activating the plasma actuators. The study indicates that even if the separation vortices flow filed is not bi-stable, the plasma active flow control is still effective.