An Experimental Study of the Effect of a Compliant Surface on the Stability of a Blasius Laminar Boundary Layer and Its Transition to Turbulence and on the Coherent Structure

9302381将进行施瓦兹实验，以表征空气流过涂有柔性、投诉材料的平坦表面的边界层。系统探讨了表面柔度对边界层线性稳定性、向湍流过渡以及湍流减阻的影响。初步的实验已经完成，以证明增加稳定性是可能的与空气流动的柔顺表面。众所周知，液体流动中存在从柔顺表面减少阻力和湍流过渡的现象，这在水力和液体泵送方面有着重要的应用。对于空气或气体，这项研究也暗示了类似的节能可能性。＊＊＊

9302381 Schwarz Experiments are to be conducted which characterize the boundary layer with air flow over a flat surface coated with a flexible, complaint material. The effect of surface compliance on linear stability of the boundary layer, transition to turbulence, and drag reduction for turbulent flow will be systematically explored. Preliminary experiments have been completed to demonstrate that increase of stability is possible with a compliant surface in air flow. Drag and turbulence transition reduction from a compliant surface is known to exist for flow of a liqud, with important hydronautic and liquid pumping application. For air or a gas, similar energy saving possibilities are implied by this research. ***