Mean flow and turbulence measurements of the impingement wall jet on a semi-circular convex surface

Tat Leung Chan, Y. Zhou, M. H. Liu, Chun Wah Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


The detailed mean flow and turbulence measurements of a turbulent air slot jet impinging on two different semi-circular convex surfaces were investigated in both free jet and impingement wall jet regions at a jet Reynolds number Rew= 12,000, using a hot-wire X-probe anemometer. The parametric effects of dimensionless circumferential distance, S/W=2.79-7.74, slot jet-to-impingement surface distance Y/W=1-13, and surface curvature D/W=10.7 and 16 on the impingement wall jet flow development along a semi-circular convex surface were examined. The results show that the effect of surface curvature D/W increases with increasing S/W. Compared with transverse Reynolds normal stress, v2̄/Um2, the streamwise Reynolds normal stress, u2̄/Um2is strongly affected by the examined dimensionless parameters of D/W, Y/W and S/W in the near-wall region. It is also evidenced that the Reynolds shear stress, -uv̄/U m2 is much more sensitive to surface curvature, D/W.
Original languageEnglish
Pages (from-to)140-149
Number of pages10
JournalExperiments in Fluids
Issue number1
Publication statusPublished - 1 Dec 2003

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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