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Posted By: keerthi ch Member Level: Bronze Posted Date: 27 Apr 2008
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2007 Andhra Pradesh State Osmania University B.E 2/4 BE mechanical fluid dynamics paper Question paper
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FACULTY OF ENGINEERING
B.E.2/4(Mechanical./Prod.)II Semester(Main)Examination,April/May-2007
FLUID DYNAMICS
Time:3 Hours] [Maximum Marks :75
NOTE:-Answer All The Questions from part A
ANY 5 FROM PART B
PART-A
(marks :25)
1.Define specific weight of fluid and explain its significance.
2.Differentiate bet dynamic n kinematic viscosity.state their units.
3.define stream function.what does the difference bet 2 stream functions indicate?
4.state impulse momentum principle.
5.Differentiate bet pressure gages n manometers.
6.what is the principle of venturi meter?
7.how is the friction factor for a laminar flow through pipe estimated?
8.explain boundary layer control.
9.define Mach cone,Mach angle n use of Mach no.
10.give an ex for steady non uniform flow.
PART-B
11.(a)state n derive newton law of viscosity.
(b)for velocity function=x(2y-1),find stream function.
12.(a)derive Bernoulli equation for flow along a stream line.state the significance of each term .
(b)a 45 deg reducing bend is connected in a pipe line,the diameters at inlet n outlet of the bend being 600mm n 300mm,resp.find the force exerted by water on the bend,if the intensity of pressure at inlet to the bend is .1 Mpa n rate of flow is 600lit/sec.
13.(a)derive an expression for discharge though a Venturi meter,using neat sketch.
(b)A pi tot tube is inserted in a pipe of 300mm diameter.the static pressure in the pipe is 100mm of mercury(vacuum).the stagnation pressure at the center of the pipe ,recorded by the pi tot tube is 0.01MPa.Calculate the rate of flow of rate of water through the pipe,if the mean velocity of the pipe is 0.85times the central velocity.Take coefficient of venturi meter=0.98.
14.(a)Differentiate between Laminar and turbulent flow through a pipe
(b)show that in the case of laminar flow through pipe Velocity Avg=1/2Vmax.
15(a)derive Hagen equation for head loss through a pipe
(b)Determine the difference in the elevations between the water surface in the two tanks which are connected by horizontal pipe of diameter 300mm and length 400mm.the rate of flow of water through the pipe is 300lps.consider all the losses. take f=0.008.
16.(a)explain with a neat sketch the phenomenon of flow of separation
(b) find the displacement thickness and momentum thickness for the velocity distribution given by u/U=2(y/sigma)-(y/sigma)square with usual notation.
17.write short notes on:-
(1)isothermal and adiabatic process
(2) Mach number,Mach cone and Mach angle
(3)stagnation pressure
(4)compressible flow and sound propagation
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