カメタニ　ユキノリ   KAMETANI YUKINORI   亀谷　幸憲    所属   明治大学  理工学部    職種   専任講師
言語種別	英語
発行・発表の年月	2015/10
形態種別	学術雑誌
査読	査読あり
標題	Effect of uniform blowing/suction in a turbulent boundary layer at moderate Reynolds number
執筆形態	共著(筆頭者)
掲載誌名	International Journal of Heat and Fluid Flow
掲載区分	国外
出版社・発行元	ELSEVIER SCIENCE INC
巻・号・頁	55,pp.132-142
著者・共著者	◎Yukinori Kametani, Koji Fukagata, Ramis Örlü, Philipp Schlatter
概要	A number of well-resolved large-eddy simulations of a spatially evolving turbulent boundary layer with uniform blowing or suction is performed in order to investigate the effect on skin friction drag as well as turbulence statistics and spectral composition at moderate Reynolds numbers up to Reθ=2500. The amplitude of uniform blowing or suction is set to be 0.1% of the free-stream velocity with different streamwise ranges of the controlled region. The boundary layer is thickened by blowing and thinned by suction. The Reynolds shear and normal stresses are increased by blowing and decreased by suction. Through spectral analysis of the streamwise velocity and cross-spectra of the Reynolds shear stress, the enhancement and reduction of the fluctuation energy in the outer region by blowing and suction are found, respectively. It is found that a more effective skin friction drag reduction and control efficiency can be achieved with a wider control region.
DOI	10.1016/j.ijheatfluidflow.2015.05.019
ISSN	0142-727X