Thermal Engineering -IR16 semester 2-2 lecture notes

Thermal Engineering -I

UNIT – I

Objectives: to form the coed learn and perceive the explanations and affects of varied losses that occur within the actual engine operation.
Actual Cycles and their Analysis: Introduction, Comparison of Air normal and Actual Cycles, Time Loss issue, Heat Loss issue, Exhaust Blowdown-Loss because of Gas exchange method, volumetrical potency. Loss because of Rubbing Friction, Actual and Fuel-Air Cycles of CI Engines.

UNIT – II

Objectives: To familiarise the coed with the varied engine systems along side their operate and necessity.
I. C. ENGINES : Classification – operating principles, Valve and Port temporal arrangement Diagrams, – Engine systems – Fuel, mechanical device, fuel injection system System, Ignition, Cooling and Lubrication, principle of wankle engine, principles of supercharging and turbo charging.

UNIT – III

Objectives: to be told concerning traditional combustion development and knock in S.I. and C.I. Engines and to search out the many engine operational parameters that have an effect on the sleek engine operation.
Combustion in S.I. Engines : traditional Combustion and abnormal combustion – Importance of flame speed and result of engine variables – sorts of Abnormal combustion, pre-ignition and knock (explanation of ) – Fuel needs and fuel rating, opposed knock additives – combustion chamber – needs, types.
Combustion in C.I. Engines : Four stages of combustion – Delay amount and its importance – result of engine variables – Diesel Knock– would like for air movement, suction, compression and combustion evoked turbulence – open and divided combustion chambers and nozzles used – fuel needs and fuel rating.

UNIT – IV

Objectives: to form the coed learn to perform testing on S.I and C.I Engines for the calculations of performance and emission parameters.
Measurement, Testing and Performance: Parameters of performance – mensuration of cylinder pressure, fuel consumption, air intake, exhaust gas composition, Brake power – Determination of resistance losses and indicated power – Performance take a look at – Heat record and chart.

II Year – II Semester
L T P C
4 0 0 3
THERMAL ENGINEERING – I

UNIT – V

Objectives: to form students find out about differing kinds of compressors and to calculate power and potency of reciprocatory compressors.
COMPRESSORS – Classification –positive displacement and roto dynamic machinery – Power manufacturing and power interesting machines, fan, blower and mechanical device – positive displacement and dynamic sorts – reciprocatory and rotary sorts.
Reciprocating: Principle of operation, work needed, equal potency, volumetrical potency and result of clearance, multi stage compression, undercooling, saving of labor, minimum work condition for 2 stage compression.

UNIT VI

Objectives: to form students learn mechanical details, and to calculate power and potency of rotary compressors
Rotary (Positive displacement type) : Roots Blower, vane sealed mechanical device, Lysholm mechanical device – mechanical details and principle of operating – potency concerns.
Dynamic Compressors: Centrifugal compressors: Mechanical details and principle of operation – speed and pressure variation. Energy transfer-impeller blade shape-losses, slip issue, power input issue, pressure constant and adiabatic constant – speed diagrams – power.
Axial Flow Compressors: Mechanical details and principle of operation – speed triangles and energy transfer per stage degree of reaction, work done issue – physical property potency- pressure rise calculations – Polytropic efficiency.

Text Books:

1. I.C. Engines / V. Ganesan- TMH a pair of. Heat engines, Vasandani & Kumar publications Thermal

References:

1. Thermal Engineering / RK Rajput/ Lakshmi Publications
2. . IC Engines – M.L.Mathur &R.P.Sharma – Dhanpath Rai & Sons.
3. I.C.Engines–AppliedThermosciences–C.R.Ferguson&A.T.Kirkpatrick-2ndEdition-Wiley Publ
4. I.C. Engines – J.B.Heywood /McGrawHIll.
5. Thermal Engineering – R.S.Khurmi & J.S.Gupta- S.chand Publ half-dozen. Thermal Engineering / PL Ballaney, Khanna Publishers