| 摘要 |
<p>A flexible composite sheet or FCS (100) comprising a membrane (102), a substrate (106) coupled to the membrane (100), and a plurality of ridges (104) coupled between the membrane (102) and the substrate (106), wherein a vibratory motion (112) is induced from the flow (114) to at least one segment of the membrane (102) spanning a distance s, wherein the vibratory motion (112) is reflected from at least one segment of the membrane (102) to the flow (114), and wherein a reduction in fluctuations is caused in the flow pressure gradient and free stream velocity U at all frequencies except around f, where f = U/s. The flexible composite sheet of FCS (100) may be coupled to a heat exchanger, a heat sink (350), a wing (15) of an aircraft (140), or a fan.</p> |
