Combined smoke-flow visualisation and hot-wire anemometry in turbulent boundary layers
The technique has been developed of recording hot-wire signals on magnetic tape and synchronising this record with cine film showing visually the motions in the smoke-filled boundary layer. Initial results show that, over significant patches of the flow, strong correlations in u-fluctuations occur along lines at approximately 400 to the surface.
KeywordsBoundary Layer Turbulent Boundary Layer Magnetic Tape Large Scale Motion Viscous Sublayer
Unable to display preview. Download preview PDF.
- 1.Fiedler, H.; Head, M.R.: Intermittency measurements on the turbulent boundary layer. J.Fluid Mech. 25 (1966) 719–735.Google Scholar
- 2.Falco, R.E.: Some comments on turbulent boundary layer structure inferred from the movements of a passive contaminant. AIAA paper no. 74–99 (1974).Google Scholar
- 3.Falco, R.E.: Bursts, superbursts and their relationship to the large scale motions of the turbulent boundary layer. Presented at IUTAM Symposium on Structure of Turbulence and Drag Reduction held at Washington DC (1976). Proceedings to be published in The Physics of Fluids.Google Scholar
- 4.Brown, G.L.; Thomas, A.S.W.: Large structure in a turbulent boundary layer. TN 16/76 Dept. of M.E., Univ. Adelaide, South Australia (1976).Google Scholar