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Fluid Flow Characteristics of a Confined Slot Jet Without or With a Target Surface

[+] Author Affiliations
L. K. Liu, C. J. Fang, M. C. Wu, C. Y. Lee, Y. H. Hung

National Tsing Hua University

Paper No. IMECE2005-80028, pp. 531-538; 8 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Fluids Engineering
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4219-3 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


A series of experimental investigations with a stringent measurement method on the fluid flow characteristics of slot jet without or with a target surface have been successfully conducted. From all the fluid velocity data measured in the present study, the experimental conditions have been verified to be spanwise-symmetrically maintained and the results have been achieved in a spanwise-symmetric form. Three types of jet configuration without or with target surface are investigated: (A) Confined Slot Jet without Target Surfaces – the fluid flow parameters studied in the present investigation is the jet Reynolds number (ReD ). Its ranges are ReD =506-1517. (B) Confined Slot Jet with Smooth Surfaces – the fluid flow parameters studied in the present investigation include the ratio of jet separation distance (H) to nozzle width (W) and the jet Reynolds number (ReD ). The ranges of the relevant parameters are H/W=2–10 and ReD =504–1526. (C) Confined Slot Jet with Extended Surfaces – the fluid flow parameters studied include the ratio of jet separation distance (H) to nozzle width (W), the Reynolds number (ReD ) and the ratio of extended surface height (Hes ) to nozzle width (W). Their ranges are H/W=3–10, Hes /W=0.74-3.40 and ReD =501–1547. The flow characteristics such as the local mean streamwise velocity distribution, mean streamwise velocity decay along jet centerline, local jet turbulence intensity distribution, and turbulence intensities along jet centerline have been presented and discussed in the study.

Copyright © 2005 by ASME
Topics: Fluid dynamics



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