A reducing elbow is used to deflect water flow at a rate of 14 kg/s in a horizontal pipe upward 30° while accelerating it (Fig. 6–20 ). The elbow discharges water into the atmosphere. The cross-sectional area of the elbow is 113 cm² at the inlet and 7 cm² at the outlet. The elevation difference between the centers of the outlet and the inlet is 30 cm. The weight of the elbow and the water in it is considered to be negligible. Determine (a) the gage pressure at the center of the inlet of the elbow and (b) the anchoring force needed to hold the elbow in place. 1 FRZ FRE mV P1.gage X 130⁰ P. atm m 30 cm

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EXAMPLE 6-2 The Force to Hold a Deflector Elbow in Place
A reducing elbow is used to deflect water flow at a rate of 14 kg/s in a horizontal pipe upward 30° while accelerating it
(Fig. 6-20). The elbow discharges water into the atmosphere. The cross-sectional area of the elbow is 113 cm² at the
inlet and 7 cm² at the outlet. The elevation difference between the centers of the outlet and the inlet is 30 cm. The weight of
the elbow and the water in it is considered to be negligible. Determine (a) the gage pressure at the center of the inlet of the
elbow and (b) the anchoring force needed to hold the elbow in place.
FIGURE 6-20
FRZ
FRX
mV₁
P1,gage
X
CV
130⁰
atm
mV
30 cm
Transcribed Image Text:EXAMPLE 6-2 The Force to Hold a Deflector Elbow in Place A reducing elbow is used to deflect water flow at a rate of 14 kg/s in a horizontal pipe upward 30° while accelerating it (Fig. 6-20). The elbow discharges water into the atmosphere. The cross-sectional area of the elbow is 113 cm² at the inlet and 7 cm² at the outlet. The elevation difference between the centers of the outlet and the inlet is 30 cm. The weight of the elbow and the water in it is considered to be negligible. Determine (a) the gage pressure at the center of the inlet of the elbow and (b) the anchoring force needed to hold the elbow in place. FIGURE 6-20 FRZ FRX mV₁ P1,gage X CV 130⁰ atm mV 30 cm
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