An acoustic technique for Lagrangian velocity measurements

Abstract : Ultrasonic transducers array can be used to track solid particles advected by a turbulent flow. The simultaneous use of four linear antennas of transducers gives the 3D position of the particles. The extraction of the Doppler frequency shift gives a precise estimation of velocity components. We describe the principle of the technique, the signal conditioning and the acquisition schemes. We show briefly the performances of the technique applied to a turbulent flow at high Reynolds number. The dynamical range of the measurement is over 55 dB and the frequency response spans over 2 decades. These performances allow us to investigate the inertial time scales of Lagrangian turbulence.
Type de document :
Article dans une revue
Review of Scientific Instruments, American Institute of Physics, 2005, 76 (1), pp.025105. 〈10.1063〉
Liste complète des métadonnées

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00180416
Contributeur : Jean-François Pinton <>
Soumis le : vendredi 19 octobre 2007 - 09:54:17
Dernière modification le : vendredi 31 août 2018 - 09:38:13
Document(s) archivé(s) le : lundi 24 septembre 2012 - 14:10:29

Fichier

RSI_05.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

  • HAL Id : ensl-00180416, version 1
  • DOI : 10.1063

Collections

Citation

Nicolas Mordant, Pascal Metz, Jean-François Pinton, Olivier Michel. An acoustic technique for Lagrangian velocity measurements. Review of Scientific Instruments, American Institute of Physics, 2005, 76 (1), pp.025105. 〈10.1063〉. 〈ensl-00180416〉

Partager

Métriques

Consultations de la notice

180

Téléchargements de fichiers

169