1996年
滑面乱流境界層の局所壁面摩擦抵抗係数と平均量特性
日本機械学会論文集. B編
- ,
- ,
- 巻
- 62
- 号
- 598
- 開始ページ
- 2230
- 終了ページ
- 2237
- 記述言語
- 日本語
- 掲載種別
- DOI
- 10.1299/kikaib.62.2230
- 出版者・発行元
- 一般社団法人日本機械学会
Measurement of the local skin friction coefficient and re-examination of the low-Reynolds-number effect are made in a zero pressure gradient turbulent boundary layer. The momentum thickness Reynolds number R_θ ranges from 840 to 6220. The wall shear stress τ_w,is determined from the direct measurement method using a floating element device in a flow field where the two-dimensionality of a boundary layer is examined thoroughly. From the present results of C_f, an empirical formula for C_f and R_θ is proposed and proven to have good accuracy. For the present R_θ range, a log region with a constant χ exists. The additive constant C, however, varies with the Reynolds number. The magnitude of the wake parameter maintains a constant value of 0.62 for R_θ >; 5000. The effect of R_θ on all the turbulent intensities is felt within the sublayer. Both the peak and its location for (uv)^^-/u^2_τ increase with R_θ.
- リンク情報
- ID情報
-
- DOI : 10.1299/kikaib.62.2230
- ISSN : 0387-5016
- ISSN : 1884-8346
- CiNii Articles ID : 110002394924
- CiNii Books ID : AN00187441