caa a22 4500 60619715X CHVBK 20210128100928.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1864-8 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1864-8 Control of vortex on a non-slender delta wing by a nanosecond pulse surface dielectric barrier discharge [Elektronische Daten] [Guang-yin Zhao, Ying-hong Li, Hua Liang, Meng-hu Han, Wei-zhuo Hua] Wind tunnel experiments are conducted for improving the aerodynamic performance of delta wing using a leading-edge pulsed nanosecond dielectric barrier discharge (NS-DBD). The whole effects of pulsed NS-DBD on the aerodynamic performance of the delta wing are studied by balanced force measurements. Pressure measurements and particle image velocimetry (PIV) measurements are conducted to investigate the formation of leading-edge vortices affected by the pulsed NS-DBD, compared to completely stalled flow without actuation. Various pulsed actuation frequencies of the plasma actuator are examined with the freestream velocity up to 50m/s. Stall has been delayed substantially and significant shifts in the aerodynamic forces can be achieved at the post-stall regions when the actuator works at the optimum reduced frequency of F +=2. The upper surface pressure measurements show that the largest change of static pressure occurs at the forward part of the wing at the stall region. The time-averaged flow pattern obtained from the PIV measurement shows that flow reattachment is promoted with excitation, and a vortex flow pattern develops. The time-averaged locations of the secondary separation line and the center of the vortical region both move outboard with excitation. Springer-Verlag Berlin Heidelberg, 2014 Zhao Guang-yin Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut Li Ying-hong Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut Liang Hua Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut Han Meng-hu Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut Hua Wei-zhuo Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-9 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1864-8 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/s00348-014-1864-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Guang-yin Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Li Ying-hong Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Liang Hua Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Han Meng-hu Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Hua Wei-zhuo Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, 710038, Xi'an, People's Republic of China aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-9 0723-4864 56:1<1 2015 56 348