caa a22 4500 606198318 CHVBK 20210128100933.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00348-015-1947-1 doi (NATIONALLICENCE)springer-10.1007/s00348-015-1947-1 Experimental investigation on the effects of wake passing frequency on boundary layer transition in high-lift low-pressure turbines [Elektronische Daten] [Yun Liang, Zheng-Ping Zou, Hou-Xing Liu, Wei-Hao Zhang] Detailed experimental investigation was carried out to investigate the interaction of unsteady wakes with boundary layer in a high-lift low-pressure turbine. Extensive measurements about boundary layer character were conducted using hot-film and hot-wire methods. In-depth analysis of the effect of wake passing frequency on boundary layer transition was carried out. The strength of separation control and profile loss variation at two wake passing frequencies were also studied. The results show that wake-induced transition can be detected in the separating shear layer, and complex vortex structures are induced by the interaction between the negative jet of wake and separation bubble. The proportions of laminar, separation and turbulence friction loss in the total loss vary with wake passing frequency, which leads to the change in the total boundary layer loss. In particular, as the wake passing frequency changes, the laminar and turbulent friction loss show opposite trends, and this indicates that the best frequency can be achieved by balancing these two types of losses. For a given high-lift profile, an optimum wake passing frequency that will lead to the minimum loss exists. Springer-Verlag Berlin Heidelberg, 2015 Liang Yun Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut Zou Zheng-Ping Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut Liu Hou-Xing Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut Zhang Wei-Hao Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut Experiments in Fluids Springer Berlin Heidelberg 56/4(2015-04-01), 1-13 0723-4864 56:4<1 2015 56 348 https://doi.org/10.1007/s00348-015-1947-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1947-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liang Yun Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Zou Zheng-Ping Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Liu Hou-Xing Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Wei-Hao Collaborative Innovation Center of Advanced Aero-Engine, National Key Laboratory of Science and Technology on Aero-Engines, School of Energy and Power Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, 100191, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/4(2015-04-01), 1-13 0723-4864 56:4<1 2015 56 348