The relationship between free-stream turbulence and boundary layer behavior was investigated with the use of spectral measurements. The power spectral densities of turbulence quantities in transitional and fully-turbulent boundary layers were computed and compared to the power spectra of the same quantities measured in the free-stream both at high and low free-stream turbulence intensities. Fluctuations were seen for both transitional and fully-turbulent boundary layers under high and low free-stream turbulence conditions. Higher-frequency fluctuations, not seen in the transitional boundary layer were seen to be associated with turbulence production in the boundary layer and appear to not be directly related to free-stream unsteadiness.
|Original language||English (US)|
|Number of pages||9|
|Journal||American Society of Mechanical Engineers, Aerospace Division (Publication) AD|
|State||Published - Dec 1 1994|
|Event||Proceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA|
Duration: Nov 6 1994 → Nov 11 1994