Application of flow suction for controlling the shedding of large-scale vortices at boundary-layer separation
A wind-tunnel study of the influence of flow suction on laminar boundary-layer separation behind a two-dimensional step on the surface is performed. Hot-wire measurements are carried out at low subsonic flow velocities. It is demonstrated that this method of flow control allows suppressing the formation of large-scale vortices determined by global stability properties of the separation region.
Key wordsboundary-layer separation vortex shedding suction separation control
Unable to display preview. Download preview PDF.
- 4.M. Kiya, M. Shimizu, O. Mochizuki, Y. Ido, and H. Tezuka, “Active forcing of an axisymmetric leading-edge turbulent separation bubble,” AIAA Paper No. 93-3245 (1993).Google Scholar
- 8.L. W. Sigurdson and A. Roshko, “The structure and control of a turbulent reattaching flow,” in: Proc. of the IUTAM Symp. on Turbulence Management and Relaminarisation (Bangalore, India, 1987), Springer-Verlag, Berlin (1988), pp. 497–514.Google Scholar
- 9.A. V. Dovgal and A. M. Sorokin, “Instability of a laminar separation bubble to vortex shedding,” Thermophys. Aeromech., 8, No. 2, 179–186 (2001).Google Scholar
- 10.A. V. Dovgal and A. M. Sorokin, “Experimental modeling of vortex shedding at flow separation behind a backward-facing step,” Thermophys. Aeromech., 9, No. 2, 183–190 (2002).Google Scholar
- 12.U. Dallmann, Th. Herberg, H. Gebing, et al., “Flow field diagnostics: topological flow changes and spatio-temporal flow structure,” AIAA Paper No. 95-0791 (1995).Google Scholar
- 14.H. Bestek, K. Gruber, and H. Fasel, “Self-excited unsteadiness of laminar separation bubbles caused by natural transition,” in: The Prediction and Exploitation of Separated Flow, Roy. Aeronaut. Soc., London (1989), pp. 14.1–14.16.Google Scholar