Water at 20°C flows through a 300-mm-diameter pipe that discharges into the atmo- sphere as shown in Figure 4.61. When a partially open valve extends 200 mm from the top of the pipe, the flow rate in the pipe is 0.2 m/s and the (gauge) pressure just upstream of the valve is 600 kPa. Estimate the force exerted by the water on the partially open valve. -Valve 600 kPa 0.2 m/s- 300 mm Atmosphere 100 mm Figure 4.61: Flow past a partially open valve

Water at 20°C flows through a 300-mm-diameter pipe that discharges into the atmo- sphere as shown in Figure 4.61. When a partially open valve extends 200 mm from the top of the pipe, the flow rate in the pipe is 0.2 m/s and the (gauge) pressure just upstream of the valve is 600 kPa. Estimate the force exerted by the water on the partially open valve. -Valve 600 kPa 0.2 m/s- 300 mm Atmosphere 100 mm Figure 4.61: Flow past a partially open valve

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

Water at 20°C flows through a 300-mm-diameter pipe that discharges into the atmo-
sphere as shown in Figure 4.61. When a partially open valve extends 200 mm from
the top of the pipe, the flow rate in the pipe is 0.2 m/s and the (gauge) pressure just
upstream of the valve is 600 kPa. Estimate the force exerted by the water on the
partially open valve.
-Valve
600 kPa
0.2 m/s-
300 mm
Atmosphere
100 mm
Figure 4.61: Flow past a partially open valve

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