B.E. III-Year Mechanical Engineering)

1 1 With effect from the academic year 2015-2016 Chaitanya Bharathi Institute of Technology (Autonomous) Department of Mechanical engineering SCHEME OF INSTRUCTION & EXAMINATION III-Year ( Mechanical engineering ) I-Semester THEORY S. No Syllabus SUBJECT Scheme of Instruction Per week Scheme of Examination Credits L T D Lab Duration in Hrs Maximum Marks End Exam Sessional 1 ME 311 Dynamics of Machines 4 1 - - 3 75 25 3 2 ME 312 Applied Thermodynamics 4 - - - 3 75 25 3 3 ME 313 Manufacturing Processes 4 - - - 3 75 25 3 4 ME 314 Heat Transfer 4 - - - 3 75 25 3 5 ME 315 Design of Machine Elements 4 1 - - 3 75 25 3 6 CE 444 Human Values and Professional Ethics 3 - - - 3 50 - - PRACTICALS 1 ME 316 Dynamics & Vibrations Lab - - - 3 3 50 25 2 2 ME 317 Thermodynamics Lab - - - 3 3 50

2 25 2 3 ME 318 Manufacturing Processes Lab - - - 3 3 50 25 2 TOTAL 23 2 - 9 - - - 21 2 With Effect from the Academic Year 2015-2016 ME 311 DYNAMICS OF MACHINES Instruction 4 Periods + 1 Tutorial per week Duration of End Examination 3 Hours End Examination 75 Marks Sessionals 25 Marks Credits 3 Objectives: 1. To find static and dynamic forces on planar mechanisms. 2. To know the causes and effects of unbalanced forces in machine members. 3. To determine natural frequencies of undamped, damped and forced vibrating systems of one, two and multi degree freedom systems.

3 Outcomes: 1. Graduates are expected to demonstrate the ability of the analysis of forces in mechanism which provide them the required inputs to design the systems which withstand operating conditions 2. Graduates will have the ability to identify the unbalance in rotors and engines and will get the knowledge of balancing. 3. Graduates are expected to understand the turning moment diagram, cyclic fluctuation in speed, fluctuation in energy and get the ability of designing flywheel. 4. Graduates will understand concepts of vibration thereby they are able to design the systems free from ill effects of vibration.

4 UNIT-I Static and Dynamic Force analysis: Force analysis of Four bar and slider crank mechanisms: Study of dynamically equivalent system, Inertia forces on connecting rod. Gyroscope: Gyroscopic couple, gyroscopic effects in vehicles. UNIT-II Governors: Classification of governors, Watt, Porter, Hartnell and Hartung governors, Controlling Force, Stability, Isochronism, Sensitivity, Power and Effort of governors. Flywheels: Functions, Differences between flywheel and governor. Turning moment diagrams, flywheels analysis for Engines and Presses. UNIT-III Balancing: Forces on bearings due to rotating shaft carrying several masses in several planes.

5 Determination of balance masses from the forces on the bearings, Shaking forces in single cylinder engine, Partial balancing of reciprocating engine. Balancing of two cylinder locomotive engine. Balancing of multi cylinder in-line engines. Balancing of radial engines by direct and reverse cranks method. UNIT-IV Vibrations: Vibrations of Single degree freedom system, (axial, transverse and torsional). Equivalent system of combination of springs, stepped shaft, whirling speed of shafts. Damped vibrations: Types of damping, Vibrations with viscous damping.

6 Forced vibrations: Vibrations with harmonically applied force with viscous damping. Dynamic magnifier, Resonance, Vibration is isolation and Transmissibility. UNIT-V Torsional Vibrations: Torsional Vibrations of Two rotor, Three rotor and Geared systems. Natural frequencies of two degree freedom systems. Modes of vibration. Approximate methods: Dunkerley s method and Rayleigh s method. Holzer s method: for multi rotor system. Text Books: 1. Rathan, Theory of Machines, Tata-Mc Graw Hill, 1995. 2. , Gordon R. Pennock, Joseph E. Shigley, Theory of Machines & Mechanisms, Oxford University Press, 2003.

7 Suggested Reading 3. A. Ghosh and Mallick, Theory of mechanisms and machines, Affiliated to E-W Press, 1988. 4. Ashok G Ambedkar, Mechanism and Machine Theory, PHI, 2013. 5. Benson H. Tangue, Principles of Vibration, 2nd Edn., Oxford University Press, 2007 6. Robert L. Norton, Design of Machinery, Tata Mc Graw Hill, 2005. 7. Charles E Wilson, J. Peter Sadler Kinematics and Dynamics of Machinery Pearson Education, 2008. 8. Banal, Brar, , Theory of Machines , Laxmi Publications, 3rd Edition., 2004. 9. Rao and Gupta, Theory and Practice of Mechanical Vibrations, PHI, 1984 3 ME 3 1 2 With Effect from the Academic Year 2015-2016 APPLI ED T HERMODYN AMI C S Instruct io n 4 P erio ds per week Duration of End Examination 3 Hours End Examination 75 Marks Sessionals 25 Marks Credits 3 Objectives: 1.

8 To demonstrate basic knowledge by understanding the basic working principles of reciprocating air compressor and its applications in engineering . 2. Students will come to know the working principle of diesel and petrol engines, their combustion phenomena and problems pertaining to abnormal combustion 3. Students will understand working principle of various fire tube and water tube boilers along with functions of their mountings. 4. To demonstrate basic knowledge by understanding various thermodynamic cycles used power steam power plants along with steam nozzles.

9 Outcomes: 1. Students will be able to estimate power required for reciprocating air compressor, used for many engineering applications. 2. Students will be able to evaluate the performance of diesel and petrol engines and suggest some suitable methods for remedy of abnormal combustion. 3. Students will be able to select the boiler depending on application and specify the mountings 4. Students will be able to estimate thermodynamic efficiency of steam power cycles and design steam nozzles. UN I T-I Reciprocating Air Compressors.

10 Uses of compressed air, Classification of compressors-single stage and multistage compressors, Derivation of work done with and without clearance volume, Workdone of multistage compressors- effect of clearance volume on work done -Inter-cooling and After-cooling UN I T-II Internal Combustion Engines- Classification, working principle, Deviation of actual cycles from air standard cycles, Index of compression and expansion for variable specific heats, Battery and Magneto ignition systems, Multipoint fuel injection system, Lubrication systems, Cooling systems, Carburetors-Simple and Zenith carburetors-Valve and Port-timing diagrams- Performance of engines- Determination of Indicated power, brake power, frictional power, brake thermal efficiency, Mechanical efficiency, indicated thermal efficiency, relative efficiency, volumetric efficiency, specific fuel consumption based on brake power and indicated power, air intake- Heat balance sheet.