The duct shown in the figure has a reduction of 1 to 2, discharge to the atmosphere in section 3, presents in addition the following characteristics: h1 = 12 cm D4 = 30 cm V2 = 1.9 m/s Q4 = 2 100 l/s P2 = 1.5 kg/cm? Ehf = 1000 cm h2 = 28 cm h3 = 33 cm D1 = 86 cm D3 = 25 cm Determine: The flow rate from 1 to 2 in I/s.

The duct shown in the figure has a reduction of 1 to 2, discharge to the atmosphere in section 3, presents in addition the following characteristics: h1 = 12 cm D4 = 30 cm V2 = 1.9 m/s Q4 = 2 100 l/s P2 = 1.5 kg/cm? Ehf = 1000 cm h2 = 28 cm h3 = 33 cm D1 = 86 cm D3 = 25 cm Determine: The flow rate from 1 to 2 in I/s.

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

Time and time related variables in engineering

Time is the event progression starting from past to present and then, future statistically. The time-related variable is any particular value in relation to time to assess its changes on a specified (XY) plane.

Question

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The duct shown in the figure has a reduction of 1 to 2, discharge to the atmosphere in
section 3, presents in addition the following characteristics:
h1 = 12 cm
D4 = 30 cm
V2 = 1.9 m/s
Q4 = 2 100 l/s
P2 = 1.5 kg/cm?
E}hf = 1000 cm
h2 = 28 cm
h3 = 33 cm
D1 = 86 cm
D3 = 25 cm
Determine:
The flow rate from i to 2 in 1/s.
The pressure at 1 if the energy losses between 1 and 2 is a value equal to half of V3.
Energy losses between 2 and 4 if the pressure is reduced by 20% by 4.
V3
vi
h2
h3
PHR
hl
Q1-2 =
P1=
hf 24=

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