Japanese | English

トップページへ戻る

詳細

   
フルテキストURL2007020193.pdf ( 602.0KB ) 公開日 2010-04-16
タイトルSelf-preservation of a turbulent boundary layer over d-type roughness
作成者Mochizuki, Shinsuke
Kameda, Takatsugu
Osaka, Hideo
作成者ヨミモチズキ, シンスケ
カメダ, タカツグ
オオサカ, ヒデオ
作成者別表記望月, 信介
亀田, 孝嗣
大坂, 英雄
作成者所属山口大学大学院理工学研究科(工学)
内容記述(抄録等)Using a direct drag balance measurement for the local wall shear stress, self-preserving development of a turbulent boundary layer was achieved experimentally over a d-type rough surface without pressure gradients. The wall shear stress and mean velocity measurements confirmed the requirements for exact self-similarity and highly similar Reynolds stress profiles within the Reynolds number range for a constant skin friction coefficient. Under the condition that the boundary layer flow is completely independent of Reynolds number, the effect of wall roughness was investigated with respect to the similarity laws for the wall layer as well as the outer layer. Experimental observation reveals the wall similarity ∂U/∂y = u_τ/ky to be applicable to the present rough wall boundary layer remaining the accepted value of Karman constant to be κ= 0.41. Otherwise, investigation of the wake strength in the mean velocity and Reynolds stress profiles reveals that the wall roughness does affect the outer layer structure. Reynolds stress measurements indicate that the primary effect of wall roughness on turbulence properties is in the component normal to the wall.
本文言語eng
著者キーワードturbulent flow
boundary layer
law of the wall
d-type roughness
資料タイプtext
ファイル形式application/pdf
出版者The Japan Society of Mechanical Engineers
出版者ヨミニホン キカイ ガッカイ
NII資料タイプ学術雑誌論文
査読の有無査読あり
ISSN1880-5558
掲載誌名Journal of Fluid Science and Technology
1
1
開始ページ24
終了ページ35
発行日2006
DOIinfo:doi/10.1299/jfst.1.24
関連情報URL(IsPartOf)http://www.jstage.jst.go.jp/browse/jfst
著者版/出版社版出版社版
リポジトリID2007020193
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2007020193