caa a22 4500 477092748 CHVBK 20180405111519.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF01893304 doi (NATIONALLICENCE)springer-10.1007/BF01893304 Non-uniform recovery of vortex breakdown over delta wing in response to blowing along vortex core [Elektronische Daten] [C. Kuo, D. Lin] The transient characteristics of vortical structure over delta wing are studied experimentally when subject to single along-core blowing perturbation. Two half delta wing models with different sweep angle Λ = 60° and Λ = 75° are investigated in this study. For Λ = 75°, the transient location of the onset of vortex breakdown moves upstream monotonously toward the unperturbed location. However, for Λ=60°, there exists a chordwise region where the upstream propagation of the onset location of vortex breakdown is temporarily delayed. This delay causes the recovery process (upstream propagation) of the onset location of vortex breakdown to be "non-uniform”. In fact, this non-uniform recovery may take on different appearance such as a plateau or overshoots and will last for several times of the convective time scaleC/U ∞. Furthermore, the location of chordwise region corresponding to this delay depends strongly upon the angle of attack (AOA). In additions, the non-uniform recovering characteristic of the onset of vortex breakdown may not be observed at high AOA if the blowing rate is too low. The mechanism governing the non-uniform recovering characteristic is clearly verified through the LDA measurement and the phase-locked flow visualization. Evidently the mutual interaction between the primary vortex structure and the secondary vortex is the key mechanism that leads to non-uniform recovering character over delta wing with sweep angle of 60° Springer-Verlag, 1996 Kuo C. Department of Mechanical Engineering, National Chung-Hsing University, 40227, Taichung, Taiwan, R.O.C. aut Lin D. Department of Mechanical Engineering, National Chung-Hsing University, 40227, Taichung, Taiwan, R.O.C. aut Experiments in Fluids Springer-Verlag 22/1(1996-11-01), 33-44 0723-4864 22:1<33 1996 22 348 https://doi.org/10.1007/BF01893304 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01893304 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kuo C. Department of Mechanical Engineering, National Chung-Hsing University, 40227, Taichung, Taiwan, R.O.C aut NATIONALLICENCE 700 1- Lin D. Department of Mechanical Engineering, National Chung-Hsing University, 40227, Taichung, Taiwan, R.O.C aut NATIONALLICENCE 773 0- Experiments in Fluids Springer-Verlag 22/1(1996-11-01), 33-44 0723-4864 22:1<33 1996 22 348 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer