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
Language English
Publication Date 2017/12
Type Academic Journal
Peer Review Peer reviewed
Title Drag reduction capability of uniform blowing in supersonic wall-bounded turbulent flows
Contribution Type Co-authored (first author)
Journal Physical Review Fluids
Journal TypeAnother Country
Publisher AMER PHYSICAL SOC
Volume, Issue, Page 2(12)
Author and coauthor ◎Yukinori Kametani, Ayane Kotake, Koji Fukagata, Naoko Tokugawa
Details Drag reduction capability of uniform blowing in supersonic turbulent boundary layers is investigated by means of direct numerical simulation of channel flows with uniform blowing on one side and suction on the other. The bulk Reynolds number based on the bulk density, the bulk mean velocity, the channel half-width, and the viscosity on the wall is set to Reb=3000. The bulk Mach number is set at 0.8 and 1.5 to investigate a subsonic and a supersonic condition, respectively. The amplitude of the blowing or suction is set to be 0.1%, 0.3%, or 0.5% of the bulk mass flow rate. At both Mach numbers, modifications of the mean streamwise velocity profiles with blowing and suction are found to be similar to those in an incompressible turbulent channel flow: The skin friction is reduced on the blowing side, while it is increased on the suction side. A noticeable Mach number effect is found only for the contribution terms containing the viscosity, which is increased by the increased temperature.
DOI 10.1103/PhysRevFluids.2.123904
ISSN 2469-990X