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FLUID MECHANICS AND MACHINERY question bank/last year question bank


ME2204                       FLUID MECHANICS AND MACHINERY                          LTPC
(Common to Aeronautical, Mechanical, Automobile & Production)         3104

OBJECTIVES:
The student is introduced to the mechanics of fluids through a thorough understanding of
the properties of the fluids. The dynamics of fluids is introduced through the control volume approach which gives an integrated under standing of the transport of mass, momentum and energy.
The applications of the conservation laws to flow though pipes and hydraulics machines
are studied

UNIT I INTRODUCTION                                                                                                     12
Units & Dimensions. Properties of fluids - Specific gravity, specific weight, viscosity,
compressibility, vapour pressure and gas laws - capillarity and surface tension. Flow
characteristics: concepts of system and control volume. Application of control volume to
continuity equiation, energy equation, momentum equation and moment of momentum equation.

UNIT II FLOW THROUG CIRCULAR CONDUITS                                                           12
Laminar flow though circular conduits and circular annuli. Boundary layer concepts.
Boundary layer thickness. Hydraulic and energy gradient. Darcy - Weisbach equaition.
Friction factor and Moody diagram. Commercial pipes. Minor losses. Flow though pipes in
series and in parallel.

UNIT III DIMENSIONAL ANALYSIS                                                                                   9
Dimension and units: Buckingham's П theorem. Discussion on dimensionless parameters. Models and similitude. Applications of dimensionless parameters.








UNIT IV        ROTO DYNAMIC MACHINES                                                                        16
Homologus units. Specific speed. Elementary cascade theory. Theory of turbo machines.
Euler's equation. Hydraulic efficiency. Velocity components at the entry and exit of the
rotor. Velocity triangle for single stage radial flow and axial flow machines. Centrifugal pumps, turbines, performance curves for pumps and turbines.

UNIT V        POSITIVE DISPLACEMENT MACHINES                                                      11
Recriprocating pumps, Indicator diagrams, Work saved by air vessels. Rotory pumps.
Classification. Working and performance curves.
TOTAL: 60 PERIODS
TEXT BOOKS:
1. Streeter. V. L., and Wylie, E.B., Fluid Mechanics, McGraw Hill, 1983.
2. Rathakrishnan. E, Fluid Mechanics, Prentice Hall of India (II Ed.), 2007.




 
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