论文标题
受控信道流中节能的基本限制以及如何击败它
A fundamental limit on energy savings in controlled channel flow, and how to beat it
论文作者
论文摘要
我们在受控通道流中的能源节省限制。对于由压力，剪切或两者组合驱动的通道中的流动，并通过壁蒸腾或跨度壁运动控制，不受控制的层状状态需要最少的净能量（占控制的能量成本）。因此，最佳控制解决方案是将流量化。此外，我们提出了超越此限制的可能性。通过同时应用壁蒸腾和跨度壁运动，我们表明有可能在受控流中获得持续的亚延伸能量消耗。我们为净能源节省提供了必要的设计标准。
We derive a limit on energy savings in controlled channel flow. For flow in a channel driven by pressure, shear, or any combination of the two, and controlled via wall transpiration or spanwise wall motion, the uncontrolled laminar state requires the least net energy (accounting for the energetic cost of control). Thus, the optimal control solution is to laminarize the flow. Additionally, we raise the possibility of beating this limit. By simultaneously applying wall transpiration and spanwise wall motion, we show that it may be possible to attain sustained sub-laminar energy expenditure in a controlled flow. We provide a necessary design criterion for net energy savings.
