JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
63908018.pdf617.9 kB
titleLDV measurements of unsteady blade suction-surface flow of an axial-flow turbine rotor
Other TitleLDV measurements of unsteady blade suction-surface flow of an axial-flow turbine rotor
Author(jpn)松沼 孝幸
Author(eng)Matsunuma, Takayuki
Author Affiliation(jpn)産業技術総合研究所
Author Affiliation(eng)National Institute of Advanced Industrial Science and Technology
Issue Date2008-02-29
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40回
Proceedings of the 40th JAXA Workshop on Investigation and Control of Boundary-Layer Transition
Start page57
End page60
Publication date2008-02-29
AbstractThe unsteady flow field of an axial-flow turbine rotor was investigated experimentally using a Laser Doppler Velocimetry (LDV) system. Detailed measurements of the time-averaged and time-resolved distributions of the velocity, flow angle, turbulence intensity, etc. were carried out at a low Reynolds number condition, Re(sub out, RT) = 3.5 x 10(exp 4). The data obtained were analyzed from the viewpoints of both an absolute (stationary) frame of reference and a relative (rotating) frame of reference. The effect of the turbine nozzle wake and secondary vortices on the rotor flow field was clearly captured. It was found that the nozzle wake and secondary vortices are suddenly distorted at the rotor inlet, because of the rotating potential field of the rotor. The nozzle flow (wake and secondary vortices) and the rotor surface flow (boundary layer flow) interact intensively inside the rotor passage. The periodic fluctuation of the relative velocity on the rotor suction surface due to the nozzle effect is as much as 20 percent of the mean rotor exit velocity.
DescriptionJAXA Special Publication
Keywordsturbine blade; axial flow turbine; velocity distribution; turbulence; unsteady flow; nozzle flow; boundary layer flow; wake; vortex; rotor stator interaction; laser doppler velocimeter; タービン翼; 軸流タービン; 速度分布; 乱流場; 非定常流; ノズル流; 境界層流れ; 後流; 渦; 動静翼干渉; レーザードップラー流速計
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-07-026E

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