FLUID MECHANICS AND MACHINERY
L T P C
(Common to Aeronautical, Mechanical, Automobile & Production)
3 1 0 4
· 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
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.
1. Ramamritham. S, Fluid Mechanics, Hydraulics and Fluid Machines, Dhanpat Rai & Sons, Delhi, 1988.
2. Kumar. K.L., Engineering Fluid Mechanics (VII Ed.) Eurasia Publishing House (P) Ltd., New Delhi, 1995.
3. Bansal, R.K., Fluid Mechanics and Hydraulics Machines, Laxmi Publications (P) Ltd., New Delhi.