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Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles

Husted, Bjarne LU ; Petersson, Per LU ; Lund, Ivar and Holmstedt, Göran LU (2009) In Fire Safety Journal 44(8). p.1030-1045
Abstract
The need for reliable measurement of droplet velocities and droplet size has increased with the more widespread use of water mist systems. Two optical measuring techniques have been investigated, Particle Image Velocimetry (PIV) and phase Doppler anemometry (PDA). Measurements have been performed on two high-pressure nozzles, a hollow cone nozzle and a full cone nozzle. Both methods performed well close to the nozzle and further away from the nozzle. In the intermediate region the results obtained with PIV are biased against the larger droplets. The two methods complement each other, PIV giving the instantaneous velocity field and PDA giving both the droplet velocity and droplet size at a point. The measurement indicates that higher throw... (More)
The need for reliable measurement of droplet velocities and droplet size has increased with the more widespread use of water mist systems. Two optical measuring techniques have been investigated, Particle Image Velocimetry (PIV) and phase Doppler anemometry (PDA). Measurements have been performed on two high-pressure nozzles, a hollow cone nozzle and a full cone nozzle. Both methods performed well close to the nozzle and further away from the nozzle. In the intermediate region the results obtained with PIV are biased against the larger droplets. The two methods complement each other, PIV giving the instantaneous velocity field and PDA giving both the droplet velocity and droplet size at a point. The measurement indicates that higher throw length can be archived with a full cone nozzle compared to the hollow cone nozzle, if both nozzles have the same cone angle and flow rate. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Water mist, PIV, PDA, High-pressure nozzles, Spray, Measurements
in
Fire Safety Journal
volume
44
issue
8
pages
1030 - 1045
publisher
Elsevier
external identifiers
  • wos:000271379300005
  • scopus:70349764317
ISSN
0379-7112
DOI
10.1016/j.firesaf.2009.07.003
language
English
LU publication?
yes
id
3f00a245-4fec-4991-be24-ccb759c241a2 (old id 1494746)
date added to LUP
2009-10-20 17:03:22
date last changed
2017-12-10 04:14:54
@article{3f00a245-4fec-4991-be24-ccb759c241a2,
  abstract     = {The need for reliable measurement of droplet velocities and droplet size has increased with the more widespread use of water mist systems. Two optical measuring techniques have been investigated, Particle Image Velocimetry (PIV) and phase Doppler anemometry (PDA). Measurements have been performed on two high-pressure nozzles, a hollow cone nozzle and a full cone nozzle. Both methods performed well close to the nozzle and further away from the nozzle. In the intermediate region the results obtained with PIV are biased against the larger droplets. The two methods complement each other, PIV giving the instantaneous velocity field and PDA giving both the droplet velocity and droplet size at a point. The measurement indicates that higher throw length can be archived with a full cone nozzle compared to the hollow cone nozzle, if both nozzles have the same cone angle and flow rate.},
  author       = {Husted, Bjarne and Petersson, Per and Lund, Ivar and Holmstedt, Göran},
  issn         = {0379-7112},
  keyword      = {Water mist,PIV,PDA,High-pressure nozzles,Spray,Measurements},
  language     = {eng},
  number       = {8},
  pages        = {1030--1045},
  publisher    = {Elsevier},
  series       = {Fire Safety Journal},
  title        = {Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles},
  url          = {http://dx.doi.org/10.1016/j.firesaf.2009.07.003},
  volume       = {44},
  year         = {2009},
}