A gate valve is being used as a shut-off valve in a pipe system. When the valve is fully open, the flow through the 10-cm diameter pipe is 20 L./min. What is the head loss at the gate valve? One liter is 0.001 cubic meters. Express your answer in m to three significant figures. View Available Hint(s) hu=1.04 Submit Previous Answers ΥΠΙΑΣΦΗ [11] ve * Incorrect; Try Again; 4 attempts remaining Part B - Pressure drop Ap= Submit The flow of water in a pipe passes through a sudden expansion from d₁-6 cm to d₂ -9 cm. If the flow rate is Q-0.02 m³/s, what is the pressure drop due to expansion? The specific weight of water is % -9.802 kN/m² Express your answer in kPa to three significant figures. View Available Hint(s) VA24 vec Part C-Loss coefficient KL- ? m ΜΕ ΑΣΦΩΠ vec A company is measuring the loss coefficient for a new valve. The valve is placed in a section of pipe with diameter D-10 cm. The flow rate is Q-0.03 m³/s. If the pressure drop is Ap-14.58 kPa, what is the loss coefficient for the valve? The specific weight of water is % -9.802 kN/m³. Express your answer to three significant figures. ▸ View Available Hint(s) kPa
A gate valve is being used as a shut-off valve in a pipe system. When the valve is fully open, the flow through the 10-cm diameter pipe is 20 L./min. What is the head loss at the gate valve? One liter is 0.001 cubic meters. Express your answer in m to three significant figures. View Available Hint(s) hu=1.04 Submit Previous Answers ΥΠΙΑΣΦΗ [11] ve * Incorrect; Try Again; 4 attempts remaining Part B - Pressure drop Ap= Submit The flow of water in a pipe passes through a sudden expansion from d₁-6 cm to d₂ -9 cm. If the flow rate is Q-0.02 m³/s, what is the pressure drop due to expansion? The specific weight of water is % -9.802 kN/m² Express your answer in kPa to three significant figures. View Available Hint(s) VA24 vec Part C-Loss coefficient KL- ? m ΜΕ ΑΣΦΩΠ vec A company is measuring the loss coefficient for a new valve. The valve is placed in a section of pipe with diameter D-10 cm. The flow rate is Q-0.03 m³/s. If the pressure drop is Ap-14.58 kPa, what is the loss coefficient for the valve? The specific weight of water is % -9.802 kN/m³. Express your answer to three significant figures. ▸ View Available Hint(s) kPa
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
![Learning Goal:
To calculate minor head losses and pressure drops
for pipe fittings.
Minor losses in pipe flow are the result of
disruptions to the steady laminar or turblent flow in
a pipe by entrances, bends, transitions, valves or
other fittings. In general, calculating these losses
analytically is too complex. However, all of these
losses can be modeled using terms of the form
h = KL where Kr, is called the loss
coefficient and is determined experimentally. This
coefficient relates the minor head loss to the
velocity head for the flow. For expansions and
contractions, the loss coefficient is calculated using
nine
the velocity for the smaller diameter pipe.
The table below gives some representative values
for various minor head losses. These are
representative only, and a more complete table
would account for different kinds of fittings and
connections (like threaded or soldered).
Fitting
Well-rounded entrance
≥0.15
Flush entrance
Re-entrant pipe
Discharge pipe
Sudden contraction (d₂ to d₂)
Sudden expansion (d, to d₂)
Gate valve-fully open
Globe valve-fully open
90° elbow
45° bend
Tee along pipe run
Tee along branch
Figure
K₂
0.6
0.4
0.2
0.4 0.6
$214²
KL
0.04
0.5
1.0
1.0
(Figure 1)
2
(¹-4)²
(1
0.19
10
0.90
0.40
0.40
1.8
< 1 of 1 >
0.8 1.0
▼
A gate valve is being used as a shut-off valve in a pipe system. When the valve is fully open, the flow through the 10-cm diameter pipe is 20 L/min. What is the head loss at the gate valve? One literis 0.001 cubic meters.
Express your answer in m to three significant figures.
▸ View Available Hint(s)
ht. - 1.04
Submit
Previous Answers
* Incorrect; Try Again; 4 attempts remaining
Part B - Pressure drop
ΠΑΣΦ [11] vec
Ap=
Submit
The flow of water in a pipe passes through a sudden expansion from d₁ - 6 cm to d₂ -9 cm. If the flow rate is Q-0.02 m³/s, what is the pressure drop due to expansion? The specific weight of water is % -9.802 kN/m²
Express your answer in kPa to three significant figures.
▸ View Available Hint(s)
Part C-Loss coefficient
KL-
19] ΑΣΦ", 41
Submit
vec ↑ @
ⒸIE
Ivec ↑
?
A
A company is measuring the loss coefficient for a new valve. The valve is placed in a section of pipe with diameter D - 10 cm. The flow rate is Q-0.03 m³/s. If the pressure drop is Ap-14.58 kPa, what is the loss coefficient for the valve? The specific
weight of water is % -9.802 kN/m³.
Express your answer to three significant figures.
▸ View Available Hint(s)
WE ΑΣΦ
13 ?
m
?
kPa](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F405527a4-5c6b-4740-8ca8-b857f61300fc%2F855e86ad-df7b-46c7-9004-f43e6563c895%2Fb85jooj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Learning Goal:
To calculate minor head losses and pressure drops
for pipe fittings.
Minor losses in pipe flow are the result of
disruptions to the steady laminar or turblent flow in
a pipe by entrances, bends, transitions, valves or
other fittings. In general, calculating these losses
analytically is too complex. However, all of these
losses can be modeled using terms of the form
h = KL where Kr, is called the loss
coefficient and is determined experimentally. This
coefficient relates the minor head loss to the
velocity head for the flow. For expansions and
contractions, the loss coefficient is calculated using
nine
the velocity for the smaller diameter pipe.
The table below gives some representative values
for various minor head losses. These are
representative only, and a more complete table
would account for different kinds of fittings and
connections (like threaded or soldered).
Fitting
Well-rounded entrance
≥0.15
Flush entrance
Re-entrant pipe
Discharge pipe
Sudden contraction (d₂ to d₂)
Sudden expansion (d, to d₂)
Gate valve-fully open
Globe valve-fully open
90° elbow
45° bend
Tee along pipe run
Tee along branch
Figure
K₂
0.6
0.4
0.2
0.4 0.6
$214²
KL
0.04
0.5
1.0
1.0
(Figure 1)
2
(¹-4)²
(1
0.19
10
0.90
0.40
0.40
1.8
< 1 of 1 >
0.8 1.0
▼
A gate valve is being used as a shut-off valve in a pipe system. When the valve is fully open, the flow through the 10-cm diameter pipe is 20 L/min. What is the head loss at the gate valve? One literis 0.001 cubic meters.
Express your answer in m to three significant figures.
▸ View Available Hint(s)
ht. - 1.04
Submit
Previous Answers
* Incorrect; Try Again; 4 attempts remaining
Part B - Pressure drop
ΠΑΣΦ [11] vec
Ap=
Submit
The flow of water in a pipe passes through a sudden expansion from d₁ - 6 cm to d₂ -9 cm. If the flow rate is Q-0.02 m³/s, what is the pressure drop due to expansion? The specific weight of water is % -9.802 kN/m²
Express your answer in kPa to three significant figures.
▸ View Available Hint(s)
Part C-Loss coefficient
KL-
19] ΑΣΦ", 41
Submit
vec ↑ @
ⒸIE
Ivec ↑
?
A
A company is measuring the loss coefficient for a new valve. The valve is placed in a section of pipe with diameter D - 10 cm. The flow rate is Q-0.03 m³/s. If the pressure drop is Ap-14.58 kPa, what is the loss coefficient for the valve? The specific
weight of water is % -9.802 kN/m³.
Express your answer to three significant figures.
▸ View Available Hint(s)
WE ΑΣΦ
13 ?
m
?
kPa
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