Abstract
The modification of the mean and fluctuating characteristics of a flat plate boundary layer subjected to nearly isotropic free stream turbulence (FST) is studied experimentally using hot-wire anemometry. The study is focussed on the region upstream of the transition onset, where the fluctuations inside the boundary layer are dominated by elongated flow structures which grow downstream both in amplitude and length. Their downstream development and scaling is investigated, and the results are compared to those obtained by previous authors. This allows some conclusions about the parameters which are relevant for the modelling of the transition process. The mechanisms underlying the transition process and the relative importance of the Tollmien-Schlichting wave instability in this flow are treated in an accompanying paper. 25 refs.
Citation Formats
Westin, K J.A., Boiko, A V, Klingmann, B G.B., Kozlov, V V, and Alfredsson, P H.
Experiments in a boundary layer subjected to free stream turbulence. Part 1: Boundary layer structure and receptivity.
Sweden: N. p.,
1993.
Web.
Westin, K J.A., Boiko, A V, Klingmann, B G.B., Kozlov, V V, & Alfredsson, P H.
Experiments in a boundary layer subjected to free stream turbulence. Part 1: Boundary layer structure and receptivity.
Sweden.
Westin, K J.A., Boiko, A V, Klingmann, B G.B., Kozlov, V V, and Alfredsson, P H.
1993.
"Experiments in a boundary layer subjected to free stream turbulence. Part 1: Boundary layer structure and receptivity."
Sweden.
@misc{etde_10144760,
title = {Experiments in a boundary layer subjected to free stream turbulence. Part 1: Boundary layer structure and receptivity}
author = {Westin, K J.A., Boiko, A V, Klingmann, B G.B., Kozlov, V V, and Alfredsson, P H}
abstractNote = {The modification of the mean and fluctuating characteristics of a flat plate boundary layer subjected to nearly isotropic free stream turbulence (FST) is studied experimentally using hot-wire anemometry. The study is focussed on the region upstream of the transition onset, where the fluctuations inside the boundary layer are dominated by elongated flow structures which grow downstream both in amplitude and length. Their downstream development and scaling is investigated, and the results are compared to those obtained by previous authors. This allows some conclusions about the parameters which are relevant for the modelling of the transition process. The mechanisms underlying the transition process and the relative importance of the Tollmien-Schlichting wave instability in this flow are treated in an accompanying paper. 25 refs.}
place = {Sweden}
year = {1993}
month = {Dec}
}
title = {Experiments in a boundary layer subjected to free stream turbulence. Part 1: Boundary layer structure and receptivity}
author = {Westin, K J.A., Boiko, A V, Klingmann, B G.B., Kozlov, V V, and Alfredsson, P H}
abstractNote = {The modification of the mean and fluctuating characteristics of a flat plate boundary layer subjected to nearly isotropic free stream turbulence (FST) is studied experimentally using hot-wire anemometry. The study is focussed on the region upstream of the transition onset, where the fluctuations inside the boundary layer are dominated by elongated flow structures which grow downstream both in amplitude and length. Their downstream development and scaling is investigated, and the results are compared to those obtained by previous authors. This allows some conclusions about the parameters which are relevant for the modelling of the transition process. The mechanisms underlying the transition process and the relative importance of the Tollmien-Schlichting wave instability in this flow are treated in an accompanying paper. 25 refs.}
place = {Sweden}
year = {1993}
month = {Dec}
}