An acoustic technique for Lagrangian velocity measurements - Archive ouverte HAL Access content directly
Journal Articles Review of Scientific Instruments Year : 2005

An acoustic technique for Lagrangian velocity measurements

(1, 2) , (2) , (2) , (2)
1
2

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.
Fichier principal
Vignette du fichier
RSI_05.pdf (159.08 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

ensl-00180416 , version 1 (19-10-2007)

Identifiers

  • HAL Id : ensl-00180416 , version 1

Cite

Nicolas Mordant, Pascal Metz, Jean-François Pinton, Olivier Michel. An acoustic technique for Lagrangian velocity measurements. Review of Scientific Instruments, 2005, 76 (1), pp.025105. ⟨ensl-00180416⟩
139 View
219 Download

Share

Gmail Facebook Twitter LinkedIn More