Facility and Techniques

Facility

facility
  • Test section: 1200 mm (Length) x 190 mm (Width) x 190 mm (Depth)
  • Capable of flow speed up to 20 m/s
  • Pressurization and vacuum system capable of varying pressure in a range from 5 KPa to 300 KPa
  • Bubble collecting dome ensures continuous operation of cavitation and ventilation experiments 

 

Measurement Techniques

Particle image velocimetry (PIV)

  • PIV system in our group consists of three Photron high speed cameras and a Photonics pulsed laser
  • It is capable of stereo time resolved PIV measurement

Shadow image velocimetry

siv
  • Pulsed LED source provides a volumetric illumination to measure bubble size distribution and velocity use shadow image
  • In-house developed software is capable of measre the sizes of both in-focus and out-of-focus bubbles as well as bubble clusters

 

Digital inline holography

dih setup
  • Single-beam light source that illuminates the flow particles and uses a digital sensor to record the interference patterns between the scattered and undisturbed portions of the beam
  • 3D locations and sizes of the particles are obtained through in-house developed digital reconstruction and object segmentation software

 

Acoustic measurement

  • The acoustic measurement system in our group consists of 3 Bruel & Kjaer 8103 types hydrophones and corresponding data acquisition system
  • Capable of conducting bubble/cavitation related water tunnel acoustic experiments at multiple locations

Laser Doppler velocimetry (LDV) and Phase Doppler Anemometry (PDA)

  • Equipped with LDV for velocitry measurement in the flow and PDA for the measurement of bubble size distribution
  • Provides the capability to measure particles in the size range of 10µm < d < 3000µm