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Unformatted text preview: h when the flow rate is 20 m3/h and (b) what
is Q in m3/h when h 58 cm?
Water
d 5 cm h Mercury venturi with a 4cm throat. The venturi is connected to a
mercury manometer whose reading is h 40 cm. Estimate
(a) the flow rate, in m3/h, and (b) the total pressure difference between points 50 cm upstream and 50 cm downstream of the venturi.
P6.159 A modern venturi nozzle is tested in a laboratory flow with
water at 20°C. The pipe diameter is 5.5 cm, and the venturi throat diameter is 3.5 cm. The flow rate is measured
by a weigh tank and the pressure drop by a watermercury
manometer. The mass flow rate and manometer readings
are as follows:
m, kg/s
˙ 0.95 1.98 2.99 5.06 8.15 h, mm P6.154 3.7 15.9 36.2 102.4 264.4  v v P6.155 It is desired to meter a flow of 20°C gasoline in a 12cmUse these data to plot a calibration curve of venturi disdiameter pipe, using a modern venturi nozzle. In order for
charge coefficient versus Reynolds number. Compare with
international standards to be valid (Fig. 6.42), what is the...
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 Spring '08
 Sakar

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