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Unformatted text preview: the accepted correlation, Eq. (6.134).
permissible range of (a) flow rates, (b) nozzle diameters,
and (c) pressure drops? (d) For the highest pressure-drop *P6.160 The butterfly-valve losses in Fig. 6.19b may be viewed as
a type of Bernoulli obstruction device, as in Fig. 6.38. The
condition, would compressibility be a problem?
“throat area” At in Eq. (6.125) can be interpreted as the
P6.156 Ethanol at 20°C flows down through a modern venturi noztwo slivers of opening around the butterfly disk when
zle as in Fig. P6.156. If the mercury manometer reading
viewed from upstream. First fit the average loss Kmean veris 4 in, as shown, estimate the flow rate, in gal/min.
sus the opening angle in Fig. 6.19b to an exponential curve.
P6.157 Modify Prob. 6.156 if the fluid is air at 20°C, entering the
Then use your curve fit to compute the “discharge coeffiventuri at a pressure of 18 lbf/in2. Should a compressibilcient” of a butterfly valve as a function of the opening anity correction be used?
gle. Plot the results and compare them to those for a...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.
- Spring '08