The suspension of a sphere in a turbulent jet

Samuel Davoust; Laurent Jacquin

doi:10.1615/tsfp6.1970

The suspension of a sphere in a turbulent jet

Samuel Davoust
, Laurent Jacquin

ONERA Office National d'Etudes et Recherches Aerospatiales

Résultats de recherche: Contribution à une conférence › Papier › Revue par des pairs

Résumé

We present an experimental study of a sphere freely suspended in a vertical turbulent jet. The sphere undergoes horizontal and vertical oscillations. The evolution of the mean equilibrium position, amplitudes and frequencies of the oscillating motion are described and the governing parameters are identified. Experimental results are used to investigate the origin of the lift force that attracts the sphere toward the jet axis. Finally, the role of the jet’s turbulence on the system is considered. A model is proposed which links the amplitude of the sphere oscillations to external turbulent forcing.

langue originale	Anglais
Pages	1237-1242
Nombre de pages	6
Les DOIs	https://doi.org/10.1615/tsfp6.1970
état	Publié - 1 janv. 2009
Modification externe	Oui
Evénement	6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009 - Seoul, Corée du Sud Durée: 22 juin 2009 → 24 juin 2009

Une conférence

Une conférence	6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009
Pays/Territoire	Corée du Sud
La ville	Seoul
période	22/06/09 → 24/06/09

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10.1615/tsfp6.1970

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title = "The suspension of a sphere in a turbulent jet",

abstract = "We present an experimental study of a sphere freely suspended in a vertical turbulent jet. The sphere undergoes horizontal and vertical oscillations. The evolution of the mean equilibrium position, amplitudes and frequencies of the oscillating motion are described and the governing parameters are identified. Experimental results are used to investigate the origin of the lift force that attracts the sphere toward the jet axis. Finally, the role of the jet{\textquoteright}s turbulence on the system is considered. A model is proposed which links the amplitude of the sphere oscillations to external turbulent forcing.",

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AB - We present an experimental study of a sphere freely suspended in a vertical turbulent jet. The sphere undergoes horizontal and vertical oscillations. The evolution of the mean equilibrium position, amplitudes and frequencies of the oscillating motion are described and the governing parameters are identified. Experimental results are used to investigate the origin of the lift force that attracts the sphere toward the jet axis. Finally, the role of the jet’s turbulence on the system is considered. A model is proposed which links the amplitude of the sphere oscillations to external turbulent forcing.

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DO - 10.1615/tsfp6.1970

M3 - Paper

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T2 - 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009

Y2 - 22 June 2009 through 24 June 2009

ER -

The suspension of a sphere in a turbulent jet

Résumé

Une conférence

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