MTech Mechanical Aspects Of Rotating Machinery syllabus for 2 Sem 2020 scheme 20MAP252

Module-1 Introduction 0 hours

Introduction:

Definition of a rotating machinery, parts of a rotating machinery w.r.t different aero engine configurations namely like turboprop, turbo shaft, turbojet and turbo fan. Basic issues in rotating machinery like vibrations, unbalance, casing rub and oil debris. Vibration: An overview of basics of vibrations and their significance in rotating machinery, Sources of vibrations in rotating machinery and its characterization. Vibration isolators, vibration measurement, sensors and analysis, industrial standards for vibration.

Module-2 Analytical modeling and solution for vibration 0 hours

Analytical modeling and solution for vibration:

Single DOF systems, free vibration, un-damped and viscously damped cases. Forced vibration, impulse and Fourier excitation. Response spectra, and modal frequency response, one & two degrees of freedom system. General multi-DOF systems including stiffness, flexibility and mass matrices. Natural frequencies and mode shapes (Eigen values and Eigen vectors), Coupled modes.

 

Energy methods:

Lagrange's equations, Application to rotor- shaft systems, Branched gear- shaft systems, Rigid body modes, Continuous (distributed parameter) systems. Critical Speeds and Response to Imbalance: Classical whirl, Coriolis effects, Euler angles, Coriolis matrix, Quadratic Eigen value problem solution, Campbell diagrams.

A d v e r t i s e m e n t
Module-3 Fatigue and creep 0 hours

Fatigue and creep:

Definition of fatigue and creep, creep and fatigue in gas turbine components, low and high cycle fatigue, life estimation of turbine blades estimation for creep, typical examples of gas turbine components failure due to creep and fatigue

Module-4 Imbalance characterization in engines 0 hours

Imbalance characterization in engines:

Rigid and flexible rotors, impact of unbalance on aero engine performance, sources of unbalance, single and multi-plane balancing, Shaft Alignment , Balancing standards for rotating machinery in industries. Bearings, Lubrication and Seals: Types of bearings in aero engines, Load and life evaluation of aircraft engine bearings, lubrication and its characterization. Application of magnetic and foil bearings in aero engines, Different types of seals used in aero engines.

Module-5 Engine noise and Inspection 0 hours

Engine noise and Inspection:

Shaft and casing stiffness measurement and methods for control, Measurement of noise, sources of noise generation and methods for noise reduction, Various methods for inspecting Engine rotating component including non-destructive methods and CMM. Engine fault diagnosis and tools

 

Course outcomes:

At the end of the course the student will be able to:

1. Distinguish the basics of concept and different kind of loads in rotating components of systems.

2. Apply knowledge systems in use.

3. Appreciate different systems and do optimization of their designs.

 

Question paper pattern:

The SEE question paper will be set for 100 marks and the marks scored will be proportionately reduced to 60.

  • The question paper will have ten full questions carrying equal marks.
  • Each full question is for 20 marks.
  • There will be two full questions (with a maximum of four sub questions) from each module.
  • Each full question will have sub question covering all the topics under a module.
  • The students will have to answer five full questions, selecting one full question from each module.

 

Textbook/ Textbooks

1 Mechanical Vibration W.T. Thomson Prentice- Hall 5th Edition 1997.

2 Rotor dynamics Prediction in Engineering Michell Lalanne and Ferraris John Wiley 1998.

 

Reference Books

1 Engineering Vibration Daniel J. Inman Prentice Hall 2007

2 Vibration problems in Engineering S.P. Timoshenko et al Wolfenden Press 2008

3 Rotor dynamics of Turbomachinery John M. Vance Wiley-Interscience 1988

4 Rotating Machinery Vibration Maurice L Adams CRC Press 2000

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