Head loss at venturi meter

foo9008

1. Homework Statement
A venturi meter is being calibrated horizontally and has a diameter of 75mm at the entrance and 50mm at the throat . The flow rate is obtained by measuring the time required to collect certain amount of water . The average number of measurement gives 0.614m^3 of water in 55.82 second . If the pressure gauge at the inlet reads 20kN/ (m^2) more than the throat , calculate the head loss due to friction using Bernoulli's equation

2. Homework Equations

3. The Attempt at a Solution
for the first step , i have use the special formula(refer to the second and third attachment) to find the therorical velocity at point 2 ( assume no energy loss) , so , i got V2 = 7.07m/s

then i found the real flow rate = 0.011(m^3) / s

assuming no loss at point 1 , i equate A2V2 = A1V1
so , i got V1= 3.14m/s
then substitute all the values that i found into the Bernoulli's equation , i found the head loss . Is my working correct ? I dont have the answer with me.

Attachments

• 19.2 KB Views: 735
• 44.3 KB Views: 495
• 124.7 KB Views: 426
Related Introductory Physics Homework Help News on Phys.org

foo9008

is the actual flow rate = 0.614/55.82 = 0.011(m^3) / s ?

foo9008

anyone can try to reply ?

foo9008

bump

"Head loss at venturi meter"

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving