Spanwise inclination and meandering of large-scale structures in a high-Reynolds-number turbulent boundary layer

Baars, W, Talluru, K, Bishop, B, Hutchins, N and Marusic, I 2014, 'Spanwise inclination and meandering of large-scale structures in a high-Reynolds-number turbulent boundary layer', in Proceedings of the 19th Australasian Fluid Mechanics Conference (AFMC 2014), Melbourne, Australia, 8-11 December 2014, pp. 1-4.


Document type: Conference Paper
Collection: Conference Papers

Title Spanwise inclination and meandering of large-scale structures in a high-Reynolds-number turbulent boundary layer
Author(s) Baars, W
Talluru, K
Bishop, B
Hutchins, N
Marusic, I
Year 2014
Conference name AFMC 2014
Conference location Melbourne, Australia
Conference dates 8-11 December 2014
Proceedings title Proceedings of the 19th Australasian Fluid Mechanics Conference (AFMC 2014)
Publisher Australasian Fluid Mechanics Society
Place of publication Australia
Start page 1
End page 4
Total pages 4
Abstract Surveys of the skin-friction velocity under a high-Reynoldsnumber turbulent boundary layer were conducted to obtain the imprint generated by large-scale structures in the logarithmic region. Two spanwise arrays of hot-films, separated in the streamwise direction, were employed to investigate the evolution of the large-scale footprint with the emphasis on usage for future real-time control. An estimate of the downstream footprint, based on the upstream input, is compared directly to the measurement from the second array. Firstly, Fourier decomposition and proper orthogonal decomposition reveal the spanwise homogeneity and periodicity. Then, by using Taylors hypothesis as a first-principal estimate, the anticipated on/off-control for targeting high-speed structures is 68.3 % accurate in terms of timing. When only considering the spanwise modes that remain coherent, and their individual convective speeds, the accuracy is improved to 72.7 %. In the final part, we elucidate on the spanwise inclination and meandering of large-scale structures. It is shown how inclined structures do not drift in the spanwise direction in the conditionally averaged results.
Subjects Aerodynamics (excl. Hypersonic Aerodynamics)
ISBN 9780646596952
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Access Statistics: 13 Abstract Views  -  Detailed Statistics
Created: Thu, 27 Jun 2019, 10:20:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us