Idea Transcript
Third Year First Semester
Department of Mechanical Engineering - Course Catalogue
1
COEG 304
Control Engineering
3cr.
Course Objective: To introduce the principles of automatic control and their applications to engineering processes. Course Description: Introduction: definition of control systems, history and examples Mathematical Modeling: physical balances, differential equations Laplace Transform: definitions, transfer functions, mathematical block diagrams Time Response Analysis: standard test signals, 1. order systems, 2. order systems, steady state response Feedback Characteristics: parameter variations, system dynamics, disturbance effects Stability Analysis: definitions based on impulse response, Rouths criterion, root locus Frequency Response Analysis: definitions, Bode diagrams and graphical representations Stability In Frequency Domain: definitions, Nyquists stability criterion, Bode-Nyquist stability criterion, closed-loop frequency response and Nichols chart, stability margins Design of Linear Control Systems: specifications, PID-controllers, serial compensation, internal feedback, experimental methods, feed forward control State Space Analysis: definition of multivariable systems, matrix representation of differential equations, transfer matrix, introduction to multivariable feedback References: 1. 2. 3. 4. 5. 6.
Wolovich: Automatic Control Systems, Basic Analysis and design, Saunders College Publishing, 1994 Ogata: Modern control Engineering 2nd Ed, Prentice Hall Int, 1990 Franklin et. al: Feedback Control of Dynamic systems 3rd Ed, Addison-Wesley, 1994 Thompson: Control Systems Engineering and Design, ELBS(Longman), 1990 Kuo: Automatic Control Systems 7th Ed, Prentice Hall Int, 1995 Nagrath and Gopal: Control Systems Engineering 2nd Ed, Wiley, 1982
Department of Mechanical Engineering - Course Catalogue
2
MGTS 301
Engineering Economy
3cr.
Course Objective: The course intends to provide understanding of the basic principles of economic analysis and tools to evaluate engineering projects in private industry, Public sector and utilities area. Course Description: Introduction to Engineering Economy: Background- Origin, principles, engineering economy and design process, engineering economic analysis procedure, accounting and engineering economy studies. Cost concepts and design economics- Cost estimating and cost terminology, the general economic environment, break-even point, cost-driven design optimization. Time Value of Money: Interest-Simple interest and compound interest. Equivalence- concept, cash flow diagrams, simple interest formulae for present, future and annual equivalents. Minimum rate of attractive return- Present worth method, future worth method, annual worth method, internal rate of return method, external rate of return method, payback period method. Comparing alternatives- Useful lives equal to study period, useful lives are different among alternatives, capitalized worth method, mutually exclusive combinations of projects. Depreciation and Income Taxes: Depreciation - Concepts, classical depreciation methods. Taxation in Nepal- Taxation laws, Corporate tax structure, Individual tax structure, and depreciation rates in taxes. Project Analysis: Cost estimation techniques- Integrated approach to develop the net cash flows, parametric cost estimating, cost estimation in the design process, value engineering. Price changes and exchange rates- Consumer price index and the producer price index, foreign exchange rates, price inflation or deflation, project analysis with price changes. Replacement analysis- Reasons and factors for replacement studies, Economic life. Dealing with uncertainty- Risk and uncertainty, sensitivity analysis, risk adjusted minimum attractive rate of returns Text Books: 1. Engineering Economy. William G. Sullivan, James A. Bontadelli, Elin M. Wicks. Pearson Education, Inc., 11th Edition, 2000. 2. Taxation laws in Nepal References: 1. E P DeGarmo, W.G. Sullivan & J A Bontadelli, Engineering Economy,McMillan, 8th Edition, 1988 2. H G Theussen et. al., Engineering Economy, Prentice Hall of India. 3. V C Gupta & Samuel Paul, Managerial Economics, McGraw Hill 4. I M Pandey, Financial Management, Bikash Publisher 5. Prasanna Chandra, Financial Management, McGraw Hill
Department of Mechanical Engineering - Course Catalogue
3
MEEG 301
Fluid Mechanics
3cr.
Fluid Properties And Definitions: Definition of fluid, Scope of fluid mechanics, Basic equations, Methods of analysis, Fluid as a continuum, Velocity field, Stress field, Fluid viscosity. Newtonian and non-Newtonian fluid. Density. Surfacetension. Compressibility. Vapour pressure. Cohesion and adhesion, Classification of fluid motions.
Fluid Statics: Pressure at a point, Basic equation of fluid statics, pressure variation in a static fluid, the standard atmosphere, Hydrostatic force on submerged plane and curved surfaces, Buoyancy and Stability, Fluids in rigid body motion. Kinematics Of Fluid Flow: Timelines, Streamlines, Streak lines, path lines, stream function, velocity potential, acceleration of fluid particle in a velocity field, Irrotational flow, fluid rotation, fluid deformation, circulation and vorticity in cylindrical and rectangular coordinates. Basic Equations of Fluid Flow: Basic laws for a system-Conservation of mass, Newtons Second Law, Principle of angular momentum, First law of thermodynamics. Reynolds Transport theorem, Eulers Equation, Bernoullis Equation, Bernoulli equation applied to irrotational flow, Static, Stagnation and Dynamic Pressures, Pitot tube, Pitot-Static tube. Flow measurement devices- venturi meter, orifice meter, nozzle meter. Forces due to fluid motion - Elbow reaction, Jet Propulsion, forces on fixed and moving vanes. Viscous Flow: Boundary layer concept, Boundary layer thickness, flow over flat plates, Laminar and turbulent boundary layer flow, fully developed laminar flow between parallel plates, laminar flow in pipes and ducts, Energy consideration in pipe flow, Calculation of head loss, Fluid flow about immersed bodies-flow over flat plates, drag on immersed bodies. Dimensional Analysis and Similitude: Nature of dimensional analysis, Buckingham Pi theorem, Determining the Pi groups, Dimensionless groups, Flow similarity and model studies. Introduction to Compressible flow: Propagation of sound waves, Stagnation properties, Basic equations for Isentropic flow, Effect of area variation in Isentropic flow, Isentropic flow of an ideal gasBasic Equations, Reference conditions, Isentropic flow in converging nozzle, Isentropic flow in Diverging nozzle. References: 1. Fox, R.W., & McDonald, A.T., Introduction to Fluid Mechanics, Fifth Edition, John Wiley & Sons 2. Kumar, K.L., Engineering Fluid Mechanics, Eurasia Publishing House, New Delhi, 1995. 3. Streeter & Wylie, Fluid Mechanics, McGraw-Hill Inc., Eighth Edition
Department of Mechanical Engineering - Course Catalogue
4
MEEG 306
Heat Transfer
3cr.
Course Objective: Understanding the differences between thermodynamics and heat transfer and to distinguish thermal energy from other form of energy and heat transfer from other forms of energy transfer. Understanding the Basic (conduction, convection, radiation) to the advance level of heat transfer. Identifying and practical aspects of heat transfer that occurs simultaneously on pipes, spheres, composite walls, compound layer. And the designing portion to design the heat exchanger which are very crucial in industrial scenario. Course Description: Conduction: The conduction rate equation, thermal properties of matter, the heat diffusion equation, boundary and initial conditions. one and two dimensional steady state conduction- plane wall, composite wall, temperature distribution, thermal resistance, contact resistance, cylindrical systems, spherical system, conduction with energy generation. Heat transfer from extended surfaces: a general conduction analysis, fins of uniform cross-section, fin performance, fins of nonuniform cross sectional area, overall surface efficiency. Finite difference equation-the nodal network, finite difference form of heat equation, the energy balance method, and finite difference solutions. Convection: Convection boundary layers- velocity, thermal and concentration boundary layers, boundary layer similarity, physical significance of the dimensionless parameters, Heat transfer from flat plates and tubes. Empirical correlations for heat transfer in pipes and tubes. Correlations for flow across cylinders and tube banks. Free convection from plates and cylinders. Boiling and Condensation: Boiling modes, Pool boiling, Forced-convection boiling, Condensation, Laminar and turbulent film condensation. Heat exchangers: Types of heat exchangers Overall heat transfer coefficient, Log mean temperature difference-parallel, counterflow heat exchangers. Heat exchanger analysis- the effectiveness-NTU method, Heat exchanger design considerations. Radiative heat transfer: Concept of black body radiation-The planck distribution, Weins displacement law, Band emission. Radiation properties- emissivity, absorptivity and reflectivity.Kirchhoffs law, the gray surface, Environmental radiation. Radiation shape factors. Radiation between gray bodies, network analysis, Radiation shields. Text Book: 1. Incropera & DeWitt, Fundamental of Heat and Mass Transfer, Fifth Edition, John Wiley & Sons, References: 1. Holman, J.P., "Heat transfer- SI Metric Edition" McGraw Hill. 2. Balachandra, V. Kalekar & Robert M. Desmond, "Heat Transfer", PHI. 3. S.P. Sukhatme, "Heat Transfer", Oriental Longman. 2. 4. Eckert & Drake, "Introduction to Heat & Mass Transfer", McGraw Hil Department of Mechanical Engineering - Course Catalogue
5
MEEG 315
Machine Element Design and Processes I
3cr.
Course Objective: Main objective of this course is to introduce different design process and make them able to design basic machine components. Mechanical design principles. Design, manufacture & assembly of basic machine elements. Machine frames, welded, adhesive & bolted joints, fasteners. Stepped shafts & features, rolling element bearings; gear mechanics & manufacture. Design for strength, design for other mechanical failure modes including fatigue, stress concentration. Safety, ergonomics & standards. Course Description: Introduction to the design process: Recognition of need. Definition of the problem. Relations between functional requirements, product geometry, material selection and manufacturing methods. Information flow between the activities in the design process. The interface between related activities. Conceptualization: evaluation of alternatives. Feedback from manufacturer and user. Feasibility studies. Preliminary design. Detailed design and analysis. Planning for manufacture. Planning for distribution and use. Problem Solving And Decision Making: The problem solving process. Creative problem solving. Invention. Brainstorming. Problem statement: need, goals, constraints, compromises, conditions, criteria for evaluation. Preparation, incubation, inspiration and verification of a solution. Working stresses: Stress concentration, stress concentration factor, fatigue failure, endurance limit, factors affecting fatigue strength, ductile materials with steady stress, combined steady and alternating stresses, notch sensitivity and factors of safety. Riveted, Screw Threaded And Welded Connections: Riveted joints, use of riveted joints, rivet diameter, pitch, design stresses, design of typical joints Welded joints, strength of fillet weld, eccentric loading, welded pressure vessels. Threaded fasteners and power screws, thread forms, effect of initial tension, effect of applied load on bolt screw, efficiency of screw thread, coefficient of friction and stresses in power screw. Mechanical Springs: Stresses in helical springs, deflection in helical springs, extension springs, compression springs, spring materials, design of helical spring, critical frequency of helical spring, fatigue loading, helical torsion spring, belleville and miscellaneous spring, energy-storage capacity Rolling Contact Bearings: Bearing types, life, bearing load, selection of ball and straight rolling bearing, selection of tapered rolling bearing, lubrication, mounting and enclosure Lubrication and Journal Bearing: Types of lubrication, viscosity, Petroff's law, stable lubrication, thick film lubrication, hydrodynamic lubrication, design consideration, bearing performance, heat balance, bearing design, bearing types, thrust bearing, bearing material. References: 1. Shigley: Mechanical engineering design, McGraw Hill 2. Shegal & Maleev: Mechanical design of machines 3. Bhattacharya & Basu Mallick: Machine design, Basu Mallick 4. Ghosh: Practical machine design, Basu Mallick & CO
Department of Mechanical Engineering - Course Catalogue
6
MEEG 315
Machine Element Design and Processes I
Department of Mechanical Engineering - Course Catalogue
3cr.
7