Summary
Under natural conditions the route to transition is somewhat different to the one observed in controlled experiments or numerical investigations. The incoming disturbances can rather be considered as a sequence of wave packets than as waves of a certain frequency and propagation angle. This leads to investigations of the propagation process of wave packets and similar disturbances in a Blasius boundary layer as a test case to active transition control. For testing and comparing different approaches for active transition control a special model-disturbance was designed.
Several (linear) concepts to cancel or attenuate linear and weakly nonlinear disturbances which can lead to transition are investigated: Superposition of discrete Fourier modes, superposition of wave packets and the FIR-(Finite duration Impulse Response)-filter concept.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
M. Faxge. Wavelet transforms and their application to turbulence. In Ann. Rev. of Fluid Mech., volume 24, pages 395–457, 1992.
M. Kloker. Direkte Numerische Simulation des laminar-turbulenten Strömungsumschlages in einer stark verzögerten Grenzschicht. Dissertation, Universität Stuttgart, 1993.
U. Konzelmann. Numerische Untersuchungen zur räumlichen Entwicklung dreidimensionaler Wellenpakete in einer Plattengrenzschicht. Dissertation, Universität Stuttgart, 1990.
E. Laurien and L. Kleiser. Numerical simulation of boundary-layer transition and transition control. J. Fluid Mech., 199: pages 403–440, 1989.
H. W. Liepmann and D. M. Nosenchuck. Active control of laminar-turbulent transition. J. Fluid Mech., 118: pages 201–204, 1982.
U. Rist. Numerische Untersuchung der räumlichen, dreidimensionalen Störungsentwicklung beim Grenzschichtumschlag. Dissertation, Universität Stuttgart, 1990.
U. Rist and H. Fasel. Direct numerical simulation of controlled transition in a flat-plate boundary layer. J. Fluid Mech., 298: pages 211–248, 1995.
A. Seitz. Private communication.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1999 Springer Fachmedien Wiesbaden
About this chapter
Cite this chapter
Gmelin, C., Rist, U., Wagner, S. (1999). Investigations of Active Control of Wave Packets and Comparable Disturbances in a Blasius Boundary Layer by DNS. In: Nitsche, W., Heinemann, HJ., Hilbig, R. (eds) New Results in Numerical and Experimental Fluid Mechanics II. Notes on Numerical Fluid Mechanics (NNFM), vol 72. Vieweg+Teubner Verlag, Wiesbaden. https://doi.org/10.1007/978-3-663-10901-3_26
Download citation
DOI: https://doi.org/10.1007/978-3-663-10901-3_26
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
Print ISBN: 978-3-663-10903-7
Online ISBN: 978-3-663-10901-3
eBook Packages: Springer Book Archive