JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
63608008.pdf656.23 kB
Other TitleOn the boundary layer instability of a supersonic rectangular nozzle
Author(jpn)坂上 昇史; 西岡 通男
Author(eng)Sakaue, Shoji; Nishioka, Michio
Author Affiliation(jpn)大阪府立大学; 大阪府立大学
Author Affiliation(eng)Osaka Prefecture University; Osaka Prefecture University
Issue Date2007-12-28
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication title境界層遷移の解明と制御研究会講演論文集 第39回
Proceedings of the 39th JAXA Workshops on Investigation and Control of Boundary-Layer Transition
Start page23
End page26
Publication date2007-12-28
AbstractThis numerical study examines the supersonic rectangular-nozzle flow by focusing attention on the development of secondary flow and corner-flow and their effects on the boundary layer instability and transition. The results show that secondary flows appear in the side wall boundary layers and form into streamwise vortices in the corner region immediately behind the throat station where the boundary layer momentum thickness Reynolds number is 400. The streamwise vortex increases in number downstream and induces a local normal-to-wall flow as large as 4 percent of the local mainstream. The present simulation is in good agreement with the corresponding experiment, in particular, on the appearance of cross-flow instability on the side wall boundary layer and the streamwise location where the streamwise vortex first appears. The corner-flow is found to be of extremely unstable nature suggesting that the turbulent transition observed is directly caused by the corner-flow disturbances.
DescriptionJAXA Special Publication
Keywordsrectangular nozzle; supersonic nozzle; nozzle flow; boundary layer transition; boundary layer separation; separated flow; supersonic flow; vortex; computerized simulation; boundary layer thickness; 矩形ノズル; 超音速ノズル; ノズル流; 境界層遷移; 境界層剥離; 剥離流; 超音速流; 渦; 計算機シミュレーション; 境界層厚さ
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-07-009

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.