Experimental study of an impinging jet with different swirl rates

Sergey V. Alekseenko, Artur V. Bilsky, Vladimir M. Dulin, Dmitriy M. Markovich

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

A stereo PIV technique using advanced pre- and post-processing algorithms is implemented for the experimental study of the local structure of turbulent swirling impinging jets. The main emphasis of the present work is the analysis of the influence of swirl rate on the flow structure. During measurements, the Reynolds number was 8900, the nozzle-to-plate distance was equal to three nozzle diameters and the swirl rate was varied from 0 to 1.0. For the studied flows, spatial distributions of the mean velocity and statistical moments (including triple moments) of turbulent pulsations were measured. The influence of the PIV finite spatial resolution on the measured dissipation rate and velocity moments was analyzed and compared with theoretical predictions. For this purpose, a special series of 2D PIV measurements was carried out with vector spacing up to several Kolmogorov lengthscales. All terms of the axial mean momentum and the turbulent kinetic energy budget equations were obtained for the cross-section located one nozzle diameter from the impinging plate. For the TKE budget, the dissipation term was directly calculated from the instantaneous velocity fields, thereby allowing the pressure diffusion term to be found as a residual one. It was found that the magnitude of pressure diffusion decreased with the growth of the swirl rate. In general, the studied swirling impinging jets had a greater spread rate and a more rapid decay in absolute velocity when compared to the non-swirling jet.

Original languageEnglish
Pages (from-to)1340-1359
Number of pages20
JournalInternational Journal of Heat and Fluid Flow
Volume28
Issue number6
DOIs
Publication statusPublished - 1 Dec 2007
Externally publishedYes

Fingerprint

Nozzles
particle image velocimetry
nozzles
swirling
moments
dissipation
Flow structure
distribution moments
Processing
energy budgets
Kinetic energy
Spatial distribution
preprocessing
Momentum
Reynolds number
budgets
spatial distribution
velocity distribution
spatial resolution
kinetic energy

Keywords

  • Dissipation
  • Impinging jet
  • Stereo PIV
  • Swirling jet
  • Turbulent kinetic energy balance

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Experimental study of an impinging jet with different swirl rates. / Alekseenko, Sergey V.; Bilsky, Artur V.; Dulin, Vladimir M.; Markovich, Dmitriy M.

In: International Journal of Heat and Fluid Flow, Vol. 28, No. 6, 01.12.2007, p. 1340-1359.

Research output: Contribution to journalArticle

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