BOUNDARY LAYER TRANSITION IN HIGH PRECISION CRITICAL NOZZLES OF VARIOUS SHAPES
Masahiro Ishibashi, Tatsuya Funaki
Abstract:
Calibration results of accurately machined critical flow Venturi nozzles are summarized and a single fitted curve of the discharge coefficient against the Reynolds number were obtained that covers from the laminar to the turbulent boundary layer regimes. Possibility to use critical flow Venturi nozzles with smaller inlet curvature such as R = 1.0 D is discussed. Effects of diffuser length, inlet curvature, inlet diameter and inlet shape are also discussed. It is shown that theories will fail to predict discharge coefficient correctly when R is small.
Keywords:
CFVN, sonic nozzles, shapes
Download:
IMEKO-TC9-2013-074.pdf
DOI:
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Event details
IMEKO TC:
TC9
Event name:
FLOMEKO 2013
Title:

16th International Flow Measurement Conference

Place:
Paris, FRANCE
Time:
24 September 2013 - 26 September 2013
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