Three-dimensional phasic velocity determination methods with wire-mesh sensor

T. Kanai, M. Furuya, T. Arai, K. Shirakawa, Y. Nishi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A gas-liquid two-phase flow in a large diameter pipe exhibits a three-dimensional flow structure. The wire-mesh sensor (WMS) can acquire a quasi-three-dimensional void fraction distribution. Furthermore, the WMS can acquire a phasic-velocity distribution on the basis of the time lag of void signals between both sets of WMS. Previously, the acquired phasic velocity was one-dimensional distributions.The authors propose a method to estimate the three-dimensional phasic-velocity distribution from the same WMS data. A three dimensional velocity vector was determined on the basis of cross-correlation analysis. The flow direction is determined by the WMS measuring-point combination, whereby the cross-correlation coefficient between both sets of WMS measuring points reveals the peak. In addition, the flow structure can be extracted by size on the basis of a wavelet analysis.The proposed method was applied for two sets of 64. ×. 64 mesh sensors in an air-water flow in a vertical pipe with inner diameter of 224. mm. The proposed method can successfully visualize a swirl flow structure where large and small bubbles tend to move respectively in inward and outward directions in turn.

Original languageEnglish
Pages (from-to)75-86
Number of pages12
JournalInternational Journal of Multiphase Flow
Volume46
DOIs
Publication statusPublished - 2012 Nov 1
Externally publishedYes

Keywords

  • Air-water two-phase flow
  • Cross-correlation analysis
  • Swirl flow
  • Three-dimensional velocity vector
  • Wavelet analysis
  • Wire-mesh sensor

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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