论文标题
强制湍流喷气机的闭环控制
Closed-loop control of forced turbulent jets
论文作者
论文摘要
对湍流的闭环控制是一个充满挑战的问题，具有重要的实用和基本意义。我们基于波浪策略对强制湍流喷气机进行闭环控制。这项研究是由最近的研究成功地将波动取消来控制过渡边界层和自由剪切流中的不稳定性波的成功而动机。使用通过系统识别技术获得的控制定律，我们成功地实施了基于波浪的闭环控制，从而实现了速度波动的高度衰减。表明控制可在广泛的流范围内降低波动水平。
Closed-loop control of turbulent flows is a challenging problem with important practical and fundamental implications. We perform closed-loop control of forced, turbulent jets based on a wave-cancellation strategy. The study is motivated by the success of recent studies in applying wave cancellation to control instability waves in transitional boundary layers and free-shear flows. Using a control law obtained through a system-identification technique, we successfully implement wave-cancellation-based, closed-loop control, achieving order-of-magnitude attenuations of velocity fluctuations. Control is shown to reduce fluctuation levels over an extensive streamwise range.
