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Note for FLUID MECHANICS AND MACHINERY - FMM by Mohit Katiyar

  • Fluid Mechanics and Machinery - FMM
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CE 6451-FLUID MECHANICS AND MACHINERY II/III MECHANICAL ENGINEERING A Course Material on CE 6451 FLUID MECHANICS AND MACHINERY By Mr. V.P.KRISHNAMURTHY ASSISTANT PROFESSOR DEPARTMENT OF MECHANICAL ENGINEERING SASURIE COLLEGE OF ENGINEERING VIJAYAMANGALAM – 638 056 1 V.P.KRISHNAMURTHY – AP/MECH 2015 - 16

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CE 6451-FLUID MECHANICS AND MACHINERY II/III MECHANICAL ENGINEERING QUALITY CERTIFICATE This is to certify that the e-course material Subject Code : CE 6451 Subject : Fluid Mechanics and Machinery Class : II - Year MECHANICAL Being prepared by me and it meets the knowledge requirement of the university curriculum. Signature of the Author Name : V.P.KRISHNAMURTHY Designation : Assistant Professor This is to certify that the course material being prepared by Mr.V.P.Krishnamurthy is of adequate quality. He has referred more than five books among them minimum one is from aboard author. Signature of HD Name : E.R.Sivakumar SEAL 2 V.P.KRISHNAMURTHY – AP/MECH 2015 - 16

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CE 6451-FLUID MECHANICS AND MACHINERY CE6451 II/III MECHANICAL ENGINEERING FLUID MECHANICS AND MACHINERY L T P C 3 0 0 3 OBJECTIVES:  The applications of the conservation laws to flow through pipes and hydraulic machines are studied  To understand the importance of dimensional analysis.  To understand the importance of various types of flow in pumps and turbines. UNIT I FLUID PROPERTIES AND FLOW CHARACTERISTICS 8 Units and dimensions- Properties of fluids- mass density, specific weight, specific volume, specific gravity, viscosity, compressibility, vapor pressure, surface tension and capillarity. Flow characteristics – concept of control volume - application of continuity equation, energy equation and momentum equation. UNIT II FLOW THROUGH CIRCULAR CONDUITS 8 Hydraulic and energy gradient - Laminar flow through circular conduits and circular annuli-Boundary layer concepts – types of boundary layer thickness – Darcy Weisbach equation –friction factor- Moody diagram- commercial pipes- minor losses – Flow through pipes in series and parallel. UNIT III DIMENSIONAL ANALYSIS 9 Need for dimensional analysis – methods of dimensional analysis – Similitude –types of similitude Dimensionless parameters- application of dimensionless parameters – Model analysis. UNIT IV PUMPS 10 Impact of jets - Euler‟s equation - Theory of roto-dynamic machines – various efficiencies– velocity components at entry and exit of the rotor- velocity triangles - Centrifugal pumps– working principle work done by the impeller - performance curves - Reciprocating pump- working principle – Rotary pumps –classification. UNIT V TURBINES 10 Classification of turbines – heads and efficiencies – velocity triangles. Axial, radial and mixed flow turbines. Pelton wheel, Francis turbine and Kaplan turbines- working principles - work done by water on the runner – draft tube. Specific speed - unit quantities – performance curves for turbines – governing of turbines. TOTAL: 45 PERIODS OUTCOMES:  Upon completion of this course, the students can able to apply mathematical knowledge to predict the properties and characteristics of a fluid.  Can critically analyse the performance of pumps and turbines. TEXT BOOK: 1. Modi P.N. and Seth, S.M. "Hydraulics and Fluid Mechanics", Standard Book House, New Delhi2004. REFERENCES: 1. Streeter, V. L. and Wylie E. B., "Fluid Mechanics", McGraw Hill Publishing Co. 2010 2. Kumar K. L., "Engineering Fluid Mechanics", Eurasia Publishing House(p) Ltd., New Delhi2004 3 V.P.KRISHNAMURTHY – AP/MECH 2015 - 16

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CONTENTS TOPIC S.NO PAGE NO UNIT-I FLUID PROPERTIES AND FLOW CHARACTERISTICS 1.1 1.1.1 1.2 1.3 1.4 1.4.1 1.5 1.6 1.7 1.8 Units And Dimensions. System Of Units Fluid Properties Viscosity Vapour Pressure Cavitation Compressibility Surface Tension Capillarity Concept Of Control Volume 6 8 8 9 9 9 10 10 10 12 1.8.1 1.8.2 1.8.3 1.9 Continuity Equation Euler's Equation Of Motion Bernoulli Equation Momentum Equation Review Questions 12 13 13 15 16 UNIT -II FLOW THROUGH CIRCULAR CONDUITS 18 2.1 2.2 2.2.1 2.2.2 Hydraulic Gradient And Total Energy Line Boundary Layer Flow Of Viscous Fluid Through Circular Pipe Development Of Laminar And Turbulent Flows In Circular Pipes 18 18 19 19 2.2.3 Boundary Layer Growth Over A Flat Plate 19 2.3 2.4 2.5 2.6 2.7 2.8 2.8.1 2.9 Flow Through Circular Pipes-Hagen Poiseuille’s Equation Darcy’s Equation For Loss Of Head Due To Friction In Pipe Moody’s Diagram Classification Of Boundary Layer Thickness Boundary Layer Separation Lossess In Pipes Major Losses In Pipe Flow Flow Though Pipes In Series And Parallel 19 20 20 21 21 21 22 22 Review Questions 23 UNIT-III DIMENSIONAL ANALYSIS Methods Of Dimensional Analysis Rayleigh’s Method Buckingham’s Π Theorem. Smilitude –Types Of Similarities 26 26 26 28 3.1 3.1.1 3.1.2 3.2 4 V.P.KRISHNAMURTHY – AP/MECH 2015 - 16

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