Page 114 - ebook fluid mechanics_finalize

FLUID MECHANICS

Exercise

1. Define and write the Bernoulli’s Equation.

2. Water is flowing along a pipe with a velocity of 7.2 m/s. Express this as a velocity

2
head in meters of water. Express the corresponding pressure in kN/m .

3. State the actual discharge equation for the following pipes.

4

5
2

6

1
7

3

8
Q1 = _______________,Q2 = _______________,Q7 = _______________

4. Water flows through a pipe AB of diameter d1 = 50 mm, which is in series with a pipe

BC of diameter d2 = 75 mm in which the mean velocity v2 = 2 m/s. At C the pipe forks
and one branch CD is of diameter d3 such that the mean velocity v3 is 1.5 m/s. The

other branch CE is of diameter d4 = 30 mm and conditions are such that the discharge

Q2 from BC divides so that Q4 = ½ Q3. Calculate the values of Q1,v1,Q2,Q3,D3,Q4 and v4.

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