Publication detail

Influence of the PDA setup on a quality of velocity distributions

OTÁHAL, J. FIŠER, J. KOŠNER, J. JÍCHA, M.

Original Title

Influence of the PDA setup on a quality of velocity distributions

English Title

Influence of the PDA setup on a quality of velocity distributions

Type

conference paper

Language

en

Original Abstract

The PDA (Phase Doppler Anemometer) is well known as one of the most useful techniques to study particle velocity and particle size distributions in two-phase flows. There are many variations to the setup of this diagnostic system, especially its geometrical parameters. Research of effervescent atomization, on a dense spray of the near-nozzle region in particular, shows that it is necessary to carry out a functionality analysis of the PDA system for such applications. The off-axis angle (scattering angle) has the essential influence on signal quality. Thus, a set of experiments has been carried out with one pressure nozzle under the same operation conditions for values of off-axis angle in the range of 30 -80 . The PDA user guide recommends a value of 73.7 as the optimum angle. Theoretically, there is no influence on acquired values of particular velocity, but this idea may be affected if the carrier of the velocity is not detected.

English abstract

The PDA (Phase Doppler Anemometer) is well known as one of the most useful techniques to study particle velocity and particle size distributions in two-phase flows. There are many variations to the setup of this diagnostic system, especially its geometrical parameters. Research of effervescent atomization, on a dense spray of the near-nozzle region in particular, shows that it is necessary to carry out a functionality analysis of the PDA system for such applications. The off-axis angle (scattering angle) has the essential influence on signal quality. Thus, a set of experiments has been carried out with one pressure nozzle under the same operation conditions for values of off-axis angle in the range of 30 -80 . The PDA user guide recommends a value of 73.7 as the optimum angle. Theoretically, there is no influence on acquired values of particular velocity, but this idea may be affected if the carrier of the velocity is not detected.

Keywords

Phase Doppler Anemometer, spray, two-phase flow, effervescent nozzle

RIV year

2007

Released

29.05.2007

Publisher

Ústav pro hydrodynamiku AV ČR, v. v. i.

Location

Praha

ISBN

978-80-87117-01-9

Book

21st Sympozium on Anemometry, Proceedings

Pages from

127

Pages to

130

Pages count

150

BibTex


@inproceedings{BUT24006,
  author="Jan {Otáhal} and Jan {Fišer} and Jan {Košner} and Miroslav {Jícha}",
  title="Influence of the PDA setup on a quality of velocity distributions",
  annote="The PDA (Phase Doppler Anemometer) is well known as one of the most useful techniques to study particle velocity and particle size distributions in two-phase flows. There are many variations to the setup of this diagnostic system, especially its geometrical parameters. Research of effervescent atomization, on a dense spray of the near-nozzle region in particular, shows that it is necessary to carry out a functionality analysis of the PDA system for such applications. The off-axis angle (scattering angle) has the essential influence on signal quality. Thus, a set of experiments has been carried out with one pressure nozzle under the same operation conditions for values of off-axis angle in the range of 30 -80 . The PDA user guide recommends a value of 73.7 as the optimum angle. Theoretically, there is no influence on acquired values of particular velocity, but this idea may be affected if the carrier of the velocity is not detected.",
  address="Ústav pro hydrodynamiku AV ČR, v. v. i.",
  booktitle="21st Sympozium on Anemometry, Proceedings",
  chapter="24006",
  howpublished="print",
  institution="Ústav pro hydrodynamiku AV ČR, v. v. i.",
  year="2007",
  month="may",
  pages="127--130",
  publisher="Ústav pro hydrodynamiku AV ČR, v. v. i.",
  type="conference paper"
}