Detail LDA-Measurements of Transitional Flows Induced By A Square Rib   Oleh:  Becker, S. ; Condie, K. G. ; Durst, F. ; McEligot, D. M. ; Stoots, C. M. Jenis: Article from Bulletin/Magazine Dalam koleksi: Journal of Fluids Engineering vol. 124 no. 1 (2002), page 108-117. Topik: MEASUREMENTS; LDA - measurements; transitional flows; square rib Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel New fundamental measurements are presented for the transition process in flat plate boundary layers downstream of two - dimensional square ribs. By use of laser Doppler anemometry (LDA) and a large Matched - Index - of - Refraction (MIR) flow system, data for wall - normal fluctuations and Reynolds stresses were obtained in the near wall region to y(+) < 0.1 in addition to the usual mean streamwise velocity component and its fluctuation. By varying velocity and rib height, the experiment investigated the following range of conditions : k(+) = 5.5 to 21, 0.3 < k/d1 < 1, 180 < Re(k) < 740, 6 × 10(4) < Re(x,k) < 1.5 × 10(5), Re(o) 660, –125 < (x–x(k)) / k < 580. Consequently, results covered boundary layers which retained their laminar characteristics through those where a turbulent boundary layer was established shortly after reattachment beyond the forcing rib. For "large" elements, evolution of turbulent statistics of the viscous layer for a turbulent boundary layer (y(+) < ~ 30) was rapid even in flows where the mean velocity profile still showed laminar behaviour. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

Copyright © 2006, 2007 Unika Atma Jaya, all rights reserved