JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• Acquire knowledge about the IC engine cycles, classification and working Principles.
• Describe the testing and performance parameters along with heat balance Sheet.
• Explain different alternate fuels, gas turbines and about jet propulsion Course Out Comes:
• Explain basic concepts of actual cycles with analysis and to describe the fundamental concepts of IC engines along with its working principles.
• Describe the combustion phenomenon in SI and CI engines.
• Evaluate the performance of IC engines and the importance of alternate fuels.
• Classify the essential components of gas turbine along with its performance Improving methods.
• Illustrate the working principle of different types of Jet propulsive engines and Rockets.

UNIT - I

Introduction: Basic Engine components and Nomenclature, Classification of Engines, The working principle of Engines, Comparison of 2-Stroke and 4-Stroke Engines; CI, and SI Engines, Ideal and Actual Working Cycles and their analysis, Valve timing Diagram. Fuels: Fossil fuels, Chemical structure of Petroleum, Properties of SI and CI Engine Fuels, Fuel Ratings; Octane Number, Cetane Number.

UNIT - II

Carburetors & Fuel Injection: Air Fuel Mixture Requirements, Construction and Working of Simple Carburetor, Calculation of Air-Fuel Ratio, Parts of Carburetor. Requirement of Injection Systems, Classification of Injection Systems, Fuel Feed pump, Injection Pumps, Working principles of Governors, Nozzles and Fuel Injector, Injection in SI and CI Engines. Combustion and Ignition Systems in SI and CI Engines: Normal and Abnormal Combustion in SI and CI Engines, Stages of Combustion, Detonation and Knocking.

UNIT - III

Performance parameters for IC Engines: Engine Power, Engine Efficiencies, Performance Characteristics, Variables Effecting Performance Characteristics, Methods of Improving Engine Performance, Heat Balance. Modern Automotive Engines: Changes in Fuel injection Methods in S.I and C.I engines, Common Rail Direct Injection System, Gasoline Direct Injection, Variable Valve Technology, A brief review of Design changes to achieve high efficiency.

R16 B.TECH MECHANICAL ENGG.

UNIT - IV

Gas Turbine: Introduction to Gas Turbines, Development, Classification and Application of Gas Turbines, Ideal and Actual Cycles; Effect of Inter cooling, Reheating, Regeneration, Combined cycle, and Cogeneration. Gas Turbine Cycles for Aircraft Propulsion: Criteria of performance, Intake, and propelling nozzle efficiencies, Simple Turbojet Cycle, The turboprop engine, Thrust augmentation, Gas turbine combustion systems, Combustion chamber designs, Gas Turbine Emissions.

TEXT BOOKS:

• 1. I.C. Engines/ Gas Turbines / V. Ganesan- Mc Graw Hill
• 2. Internal Combustion Engines /Colin R. Ferguson /Wiley

REFERENCE BOOKS:

• 1. Fundamentals of Internal Combustion Engines / H.N Gupta / PHI
• 2. Gas Turbine Theory/ HIH Saravanamuttoo, Cohen, Rogers/ Pearson R16 B.TECH MECHANICAL ENGG.