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Communication Dans Un Congrès Année : 2013

Optimal amplification of streamwise streaks in plane jets and their stabilizing effect on the inflectional instability

Résumé

Optimal transient energy growths supported by the plane Bickley jet are computed for a set of spanwise wavenumbers and Reynolds numbers. It is shown that the maximum energy amplification is proportional to the square of the Reynolds number. The computed optimal streamwise vortices are then used to efficiently force finite amplitude streaks that are shown to stabilize the jet's powerful inflectional instability, which is clearly relevant for a number of applications in the control of free shear flows.
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Dates et versions

hal-04020001 , version 1 (08-03-2023)

Identifiants

  • HAL Id : hal-04020001 , version 1
  • OATAO : 10280

Citer

Gerardo del Guercio, C. Cossu, Grégory Pujals. Optimal amplification of streamwise streaks in plane jets and their stabilizing effect on the inflectional instability. 14th European Turbulence Conference - ETC14, Sep 2013, Lyon, France. pp.0. ⟨hal-04020001⟩
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