Experimental investigations of forerunners at the fronts of localized disturbances of a straight wing boundary layer
Under the conditions of high turbulence level in the oncoming flow, the laminar-turbulent transition is due to the action of disturbances proceeding from the external flow on the boundary layer; as a result, in the boundary layer, streamwise-oriented (longitudinal) structures consisting of regions with an excess and deficit of the longitudinal velocity are formed. These structures provide preconditions for the development of high-frequency wave disturbances such as secondary instability and forerunners, which can further transform into turbulent spots. As a result, the boundary layer flow goes over from the laminar to the turbulent state. This work is devoted to the experimental study of wave packets (forerunners) formed in boundary layers in the regions that precede a drastic change in the flow velocity inside the boundary layer.
boundary layer forerunner hot-wire measurements localized disturbance straight wing
V.N.Gorev M.M.Katasonov V.V.Kozlov
Khristianovich Institute of Theoretical and Applied Mechanics, Novosibirsk, 630090, Russia
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）