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Article Dans Une Revue Physics of Fluids Année : 2014

Stability of a swirled liquid film entrained by a fast gas stream

Résumé

We study the liquid flow inside a recessed gas-centered swirl coaxial injector, where a swirled liquid flowing against an outer wall is destabilized by a central fast gas stream. We present measurements of the liquid intact length inside the injector, as a function of swirl number and dynamic pressure ratio. We propose a simple model to account for the effect of these parameters.We next study the surface instability inside the injector: its frequency ismeasured for several swirl angles, and as a function of gas velocity. Results are first confronted to the predictions of an inviscid linear stability analysis including swirl, and second to the predictions of a viscous linear stability analysis where swirl is not included. The viscous analysis captures the experimental frequency.
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Dates et versions

hal-00987576 , version 1 (06-05-2014)

Identifiants

  • HAL Id : hal-00987576 , version 1

Citer

Jean-Philippe Matas, Moongeun Hong, Alain H. Cartellier. Stability of a swirled liquid film entrained by a fast gas stream. Physics of Fluids, 2014, 26, pp.042108. ⟨hal-00987576⟩

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