Summary
Spatial direct numerical simulations (DNS) are carried out to investigate laminar-turbulent transition scenarios under varying temperature conditions of the oncoming flow, distinguishing wind-tunnel and flight conditions. First, Linear Stability Theory is used for both cases to get an overview of the primary stability behaviour of the flat-plate boundary layer where different disturbance modes have to be regarded. Simulations have been performed for fundamental and oblique breakdown in both cases. The investigation of the streamwise amplitude development in connection with the corresponding wall-normal disturbance profiles gives information about which types of modes interact to eventually trigger laminar-turbulent breakdown. The results allow estimations of the probability of the different transition scenarios in practice.
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© 1999 Springer Fachmedien Wiesbaden
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Fezer, A., Kloker, M. (1999). Transition Processes in Mach 6.8 Boundary Layers at Varying Temperature Conditions Investigated by Spatial Direct Numerical Simulation. 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_19
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DOI: https://doi.org/10.1007/978-3-663-10901-3_19
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
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