GAUHATI UNIVERSITY

SYLLABUS FOR FOURTH YEAR B. E. COURSE (1996 REVISION)

Department of Mechanical Engineering

FIFTH SEMESTER

ME 577 MACHINE DESIGN – I (3-3-0)

Full Marks: 100

Sessional: 100

Time: 4 hrs

1. Introduction: General considerations and procedures of machine design. Concepts of mechanism, machines and components, stress deflection analysis. Types of loads. Design stress and factor of safety. Stress concentration. Relevance to manufacturing methods, selection of materials, fits and tolerances.

2. Joints:

(a) Detachable joints: i) Design of threaded fasteners and screwed joints; (ii) Design of keys, pins and cotter joints.

(b) Permanent joints: (i) Design if riveted joints, (ii) Design of welded joints

3. Design of axles and Shafts. Shafts subjected to bending, torsion, axial loading, and combined loading.

4. Designs of couplings - - - Flange couplings.

5. Design of power screw and thrust bearings, coller bearings.

6. Design of pulleys, belt drive, rope drive and chains.  

Books: 1. Machine Design by Black and Adams (TMH)

2. Design of machine elements by M F Spott

3. Design of machine elements by B V Vandari (TMH)

4. Machine Design by Hall

5. Machine Design by Khurmi and Gupta

6. Machine Design by Bahl and Goel

7. Machine Design by Shigley.  

 ME 578 FLUID MECHANICS – II ( 3 – 1 – 2 )

Theory – 100 marks

Sessional – 50 marks

Laboratory – 50 marks

1.      Compressible flow: Perfect gas, speed of sound – Mach number/ Isentropic flow nozzle flow, choking / Sub-sonic and supersonic flow, / Shock waves – normal shock / very brief introduction to – Fanno and Reyligh lines, Fanno flow, Rayligh flow and isothermal flow in long pipelines.

2.      Viscous flow: Characteristics of laminar and turbulent flow. Laminar separation vs turbulent separation. Form drag and skin friction drag, Boundary layer concept – Prandtl boundary layer equation, drag on a flat plate, momentum integral method.

3.      Turbulent flow: Causes and characteristics, Shear stress due to turbulence (Reynold’s stresses). Prandtl’s mixing length theory, Karman’s similarity hypothesis. Velocity distribution, shear velocity, Universal velocity distribution. Hydraulically smooth and rough boundaries. Velocity distribution in rough pipes. Nikuradse’s experiment on artificially roughened pipes. Karman-Prandtl resistance equation. Explicity equation for friction factor.

4.      The Principles of fluid machines: Euler’s equation for turbomachinery and its application to centrifugal pump and radial flow reaction turbine/ Brief introduction to impulse turbine ( Pelton wheel ), Reaction turbine ( Francis & Kaplan )/

Pumps : Reciprocating pumps, Centrifugal pumps ( Detailed treatment ), Axial and mixed flow pumps, Screw pump – Jet pump – Airlift pump – Hydraulic ram. Cavitation in pumps & turbines.

5.     A brief introduction to open channel flow.  

Books : i) Fluid mechanics by Streeter and Wylie, McGraw Hill.

ii) Fluid mechanics by K K Mahanty , Prentice Hall, 2nd Edition.

iii) Fluid mechanics by Massey, ELBS.  

ME 579 APPLIED THERMODYNAMICS – I (3-1-2)

Theory – 100 marks

Sessional – 50 marks

Lab. – 50 marks

1.      Availability : Available and unavailable energy, Available energy referred to a cycle, Availability in non-flow or closed system (Non-cyclic), Availability of steady-flow systems, Helmhltz and Gibb’s functions, Irreversibility and loss in availability, Effectiveness.

2.      Boiler: Classification of boilers, mountings, accessories, evaporation capacity, equivalent evaporation, boiler efficiency, selection of a boiler, boiler feed water treatment and boiler troubles.

3.      Basic steam power cycles: Carnot and Rankine cycles, Modified Rankine cycle, Regenerative and Reheat cycles.

4.      Steam nozzles: Expansion of steam through nozzles, velocity and pressure variation in nozzles, Critical pressure ratio, mass flow rate and maximum mass flow rate, Representation of heat drop in nozzles in Mollier diagram, Nozzle efficiency.

5.      Steam turbines: Classification, Flow of steam through impulse and reaction turbines, Velocity diagrams, Reheating, Bleeding, Reheat factor, Compounding and governing of steam turbines, Back pressure turbines, Pass out turbines.

6.     Steam condensers: Function of steam condenser, Elements of a condenser plant, vacuum production, Delton’s law of partial pressure, Classification of condensers, Sources of air leakage in condensers and their effects, Removal of air from the condesers, Vacuum efficiency and condenser efficiency, Determination of cooling water, Cooling towers and cooling ponds.  

Reference books:

1.      A course in thermodynamics and heat engines by Domkundwar, Kothendaraman, Khajuria and Arora, Dhanpat Rai and Sons.

2.      Thermal Engineering by Rajput, Laxmi Publications.

3.      Elements of heat engines by Patel, Karamchandani

4.     A text book of thermal engineering by Khurmi, Gupta, K Chand Publications.  

ME 580 NUMERICAL ANALYSIS AND COMPUTER PROGRAMMING (3-0-3)

Theory – 100 marks

Sessional – 100 marks

Mini-project – 25 marks

Part – I (70 marks)

1.      Errors in numerical calculation: Numbers and their accuracy, errors and their analysis, Absolute, relative and percentage errors, general error formula, error in a series of approximation.

2.      Solution of algebric and transcendental equations: Bisection method, Iteration method, method of false position, Quotient-difference method, Solution of a system of non-linear equation ( Iteration and Newton-Raphson methods).

3.      Interpolation: Errors in polynomial nterpolation, Finite differences ( Forward, backward and central differences ). Newton’s formula for interpolation, Central difference for interpolation (Gauss’s Stirling and Bessel’s formula). Interpolation with unevenly spaced points (Lagrange’s interpolation formula), Errors accumulation in different methods.

4.      Numerical differentiation and integration: Differentiation – Cubic spline method, Maximum and minimum values of tabulated functions. Integration – Trapexoidal rules, Simpson’s 1/3 rule, Simpson’s 3/8 rule, Generalized quadrature.

5.     Numerical solution of ordinary differential equation: Ordinary initial value problems- Eulen’s method, Runge – Kutta method, Accumulation of error ordinary boundary value problems – Second order boundary va;lue problems.  

Part - II

Marks: 30

Development of computer program for

i) the solution of algebraic and transcendental equations

ii) numerical differentiation involving forward, backward and central difference formula

iii) numerical iteration involvong trapezoidal Simpson’s rule

iv) the solutions of ordinary differential equations by Runge-Kutta method

A mini-project report should be prepared and to be evaluated for 25 sessional marks.

Reference books:

1.      Introductory Methods of Numerical Analysis by S S Shastry

2.     Numerical Methods in FORTRAN by J M McCormick and MG Salvadori, PHI.