Syllabus - Combustion & Heat Transfer (AU702 (A))

Automobile Engineering

Combustion & Heat Transfer (AU702 (A))

VII

Unit-I

Combustion

Combustion phenomena of S.I. and C.I. engines, Stages of combustion- Photographic studies of combustion process- p-q diagrams in S.I. and CI engines. Abnormal combustion-Effect of engine variables on knock-Factors controlling combustion chamber design.

Combustion chambers

Diesel engine combustion chambers open, Divided, Swirl, Turbulent and Ricardo's M Combustion chambers.

Unit-II

Heat Transfer in IC engines

Heat transfer, Temperature distribution and thermal stress in Piston, Cylinder Liner, cylinder head, Fins and valves. Variation of gas temperatures, Heat transfer coefficient and combustion system-Effect of engine load on piston temperature heat rejected to coolant quantity of water required.

Unit-III

Measurements

Flow meters-Volumetric type, gravimetric type-fuel consumption measurement in vehicles-Air consumption: Air box method, viscous air flow meter; flame temperature measurement and pressure measurement.

Unit-IV

Introduction to heat transfer

Temperature, Heat and thermal equilibrium, Modes of basic laws of heat transfer i.e. conduction, Convection and Radiations; Fourier equation and Thermal Conductivity, Derivation of the general form of heat conduction equation in Cartesian, Cylindrical Spherical Coordinates.

Unit-V

Conduction Heat Transfer

Steady State Conduction, Heat conduction through plane wall, Composite wall, cylindrical wall, Multi layer cylindrical wall, and through spheres; effect of variable conductivity, Critical thickness of Insulation; conduction with heat generation, plane wall with uniform heat generation, Dielectric heating, Cylinder with uniform heat generation, Heat transfer through Piston crown. Heat transfer from extended surface, steady flow of heat along a rod, Governing differential equation and its solution, Heat dissipation from and infinitely long fin, Fin performance.

Unit-VI

Convection Heat Transfer

Free and forced convection, Laminar and Turbulent flow, Newton-Rekhman Law: Convection rate equation, Nusselt Number; radiation heat exchanger; salient features and characteristics of radiation, Absorptive, reflectivity and transmittance; spectral and spatial energy distribution, wavelength distribution of black body radiation, Plank's law; total emissive power: Stefan Boltzman law, Wien's displacement law, Kirchoffs Law, gray body and selective emitters, intensity of

Practicals

Reference Books

  • Arora and Domkundwar, Heat and Mass Transfer

  • D.S. Kumar, Heat and Mass Transfer.

  • Frank Kreith, Heat Transfer

  • P.M. Heldt, Internal combustion engines.

  • V. Ganeshan Internal combustion engines.

  • Eckert and Drake, Introduction to heat transfer.

  • Jakob and Hawkins, Elements of Heat Transfer

  • Holman, Heat Transfer