Unformatted text preview: pted from Ref. 30.) 0 15° cone angle
7° cone angle 0.2 0.3 0.4 0.5 0.6 0.7 0.8 β | e-Text Main Menu | Textbook Table of Contents | Study Guide 6.10 Fluid Meters 403 The other types of instruments discussed earlier in this section can also serve as
flowmeters if properly constructed. For example, a hot wire mounted in a tube can be
calibrated to read volume flow rather than point velocity. Such hot-wire meters are
commercially available, as are other meters modified to use velocity instruments. For
further details see Ref. 30.
We want to meter the volume flow of water (
1.02 10 6 m2/s) moving
through a 200-mm-diameter pipe at an average velocity of 2.0 m/s. If the differential pressure
gage selected reads accurately at p1 p2 50,000 Pa, what size meter should be selected for
installing (a) an orifice with D: 1 D taps, (b) a long-radius flow nozzle, or (c) a venturi nozzle?
What would be the nonrecoverable head loss for each design? Solution
Here the unknown is the ratio of the meter. Since the discharge coefficient is a complicated
function of , iteration will be nece...
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- Spring '08
- Fluid Dynamics, e-Text Main Menu, Osborne Reynolds