Bluff Body Wake Stability Enhancement by Mean of Non-Isothermal Blowing

• Autorzy: Mathelin, L. , Bataille, F.
• Konferencja: French-Polish Seminar of Mechanics (19 ; 8-11.06. 2011 ; Perpignan, France)
• Języki publikacji: EN

Abstrakty

EN

The influence of blowing or suction from the surface of a porous circular cylinder in crossflow onto the dynamics of its near wake is numerically studied for flows close to the onset of the wake vortex shedding regime at a Reynolds number of 49. Two cases are considered: the blowing may be at the same temperature as the mainstream fluid or at a lower temperature. The latter case is mainly motivated by arguments of thermal protection of the cylinder from a hot incident flow. Local and global instability growth rates are investigated under the effect of different blowing locations and temperatures. It is shown that both blowing and suction have a dramatic impact on the absolutely unstable region, thus affecting the wakr behavior, eventually leading to the suppression of vortex shedding.

Słowa kluczowe

EN

suction/blowing; vortex wake; mechanical energy; critical Reynolds number; circular cylinder

• Czasopismo: Machine Dynamics Research
• Rocznik: 2011
• Tom: Vol. 35, No. 1
• Strony: 108-122
• Opis fizyczny: Bibliogr. 23 poz., wykr.

Twórcy

autor

Mathelin, L.

autor

Bataille, F.

• LIMSI, CNRS, BP 133, 91403 Orsay cedex, France,

Bibliografia

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