Hall Ticket No Question Paper Code: AAE003
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech III Semester End Examinations (Supplementary) February, 2018
Regulation: IARE R16
FLUID MECHANICS AND HYDRAULICS
(Aeronautical Engineering)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define density, weight density, specific volume and specific gravity of fluid.
Find the volume of the water displaced and position of center of buoyancy for a wooden block
of width 2.5 m and of depth 1.5 when it floats horizontally in water. The density of wooden
block is 650 kg/m3 and its length 6.0 m.
2. Define surface tension. Prove that the relationship between surface tension and pressure inside
a droplet of liquid in excess of outside pressure is given by p
d .

The right limb of a simple U-tube manometer containing mercury is open to the atmosphere
while the left limb is connected to a pipe in which liquid of specific gravity 0.9 is flowing. The
centre of the pipe is 12 cm below the level of mercury in the right limb. Find the pressure of
fluid in the pipe if the difference of mercury level in the two limbs is 20 cm.
UNIT II
3. Differentiate between stream function and velocity potential function.
A 30 cm diameter pipe, conveying water, branches into two pipes of diameters 20 cm and 15 cm
respectively. If the average velocity in the 30 cm diameter pipe is 2.5 find the discharge in
this pipe. Also determine the velocity in 15 cm pipe if the average velocity in 20 cm diameter
pipe is 2 m/s.
4. Define Stream line Path line and Streak line.
A vertical cylinder 300mm in diameter is fitted at the top with a tight but frictionless piston and
filled with water at 700 C as shown in Figure 1. The outer portion of the piston is exposed to
atmospheric pressure of 101.3 kPa. Calculate the minimum force applied on the piston that will
cause water to boil at 700 C. Take Vapor pressure of water at 700 C as 32k Pa.
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Figure 1
UNIT III
5. Develop Euler's equation of motion and obtain Bernoulli's equation from it?
A horizontal venturimeter with inlet and throat diameters 30 cm and 15 cm respectively is used
to measure the flow of water. The reading of differential manometer connected to the inlet and
the throat is 20 cm of mercury. Determine the rate of flow. Take Cd 0.98.
6. Explain Vortices, Irrotational flow and compressible flows.
Explain about Venturi meter and Orifice tube.
UNIT IV
7. What is meant by laminar boundary layer and turbulent boundary layer.
Define Froude Number and state its applications.
8. Explain Reynolds's experiment with neat sketch and explain how to determine laminar and
turbulent flows.
Show that the difference of pressure head for a given length of the two parallel plates which are
fixed and through which viscous fluid is flowing is given by
hf 12uL
gt2
UNIT V
9. Explain the classification of turbo machines with neat a sketch.
A turbine stage with a rotational speed of 3000 rpm is to be designed with an absolute inlet angle
of and an absolute exit angle of at a mean radius of 0.4 m. The machine is to be
designed for a constant axial velocity of 450 m/sec. Estimate the specific work from this stage.

10. What are the reasons for minor losses in pipes? Give the appropriate formula to calculate the
losses.
Define impulse momentum and derive the momentum equation.