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Effect of Inlet Curvature on the Discharge Coefficients of Toroidal-Throat Critical-Flow Venturi Nozzles (Keynote)

[+] Author Affiliations
Masahiro Ishibashi, Toshihiro Morioka

National Metrology Institute of Japan, Ibaraki, Japan

B. Thomas Arnberg

University of Colorado at Denver, Denver, CO

Paper No. FEDSM2005-77470, pp. 467-474; 8 pages
doi:10.1115/FEDSM2005-77470
From:
  • ASME 2005 Fluids Engineering Division Summer Meeting
  • Volume 2: Fora
  • Houston, Texas, USA, June 19–23, 2005
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4199-5 | eISBN: 0-7918-3760-2
  • Copyright © 2005 by ASME

abstract

The effect of the inlet curvature R on the discharge coefficients of toroidal throat critical flow Venturi nozzles is discussed based on calibration results of high-precision nozzles HPNs with R = 1.0, 1.2, 1.5, 1.8, 2.0, and 2.5D, where D is the throat diameter (9.6, 13.4, and 18.9 mm). The Reynolds numbers RD range from 1.2×105 to 1.2×106 , corresponding to absolute upstream pressures of 0.1 to 0.7 MPa. The calibrations were performed by a constant volume tank system developed for the primary standard in Japan.

Copyright © 2005 by ASME

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