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C192031 Pages:2

pipe has a slope of 1 in 30. Find the pressure at the lower end if the pressure at
the higher level is 19.62 N/em’.
Obtain the condition for maximum power transmission through pipes and
corresponding efficiency of transmission.
PART C

Answer any four full questions, each carries 10marks.
Define displacement thickness. Derive an expression for the displacement
thickness.
Find the displacement thickness, the momentum thickness and energy thickness

for the velocity distribution in the boundary layer given by
(१/2) = 2(y/8) - ௫/6)*

What is meant by boundary layer separation? What are the different methods of
preventing boundary layer separation?
The resisting force R of supersonic plane during flight can be considered as
dependent upon the length of the aircraft L, velocity V, air viscosity ‏لم‎ , air
density p and bulk modulus of air K. Express the functional relationship between
these variables and the resisting force by using Buckingham’s theorem
Define the following

i. Reynold’s Number.

11. Froude’s Number.

11. | Euler’s Number.

iv. Weber’s Number.

v. | Mach’s Number.
The pressure drop in an aeroplane model size 1/40 of its prototype is 80 N/em’.
The model is tested in water. Find the corresponding pressure drop in the
prototype take density of air = 1.24kg/m?. The viscosity of water is 0.01 poise
while the viscosity of air is 0.00018 poise.

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