1. INTERNAL COMBUSTION ENGINES LECTURER PROF.Dr. DEMIR BAYKA

2. QUIZ No: 18 3000 List the engine parameters that are affected by heat transfer.

3. ENGINE HEAT TRANSFER EFFECTS OF HEAT TRANSFER STRENGTH OF ENGINE COMPONENTS OIL VISCOSITY ENGINE PERFORMANCE ABNORMAL COMBUSTION EMISSIONS TURBOCHARGER PERFORMANCE MECHANICAL EFFICIENCY

4. STRENGTH OF THE ENGINE COMPONENTS WILL DECREASE DUE TO 1. HIGH TEMPERATURE 2. THERMAL FATIQUE

5. STRENGTH OF THE ENGINE COMPONENTS MAXIMUM GAS TEMPERATURE  2500 K MAXIMUM ALLOWABLE METAL TEMPERATURES CAST IRON  400 C ALUMINUM ALLOY  300 C

6. STRENGTH OF THE ENGINE COMPONENTS THERMAL STRESSES 1) UNEVEN COOLING OF THE ENGINE 2) RATE OF COOLING

7. OIL VISCOSITY IN GENERAL THE TEMPERATURE OF THE OIL SHOULD NOT EXCEED 180 C TEMPERATURES OF 200 - 250 C MAY BE TOLERATED AROUND THE TOP LAND OF THE PISTONS

8. ENGINE PERFORMANCE HEAT TRANSFER FROM THE GAS TO THE CYLINDER WALLS IS LOSS OF USEFUL ENERGY. MORE HEAT TRANSFER MEANS LESS EFFICIENCY AND LESS SPECIFIC WORK (P b )

9. ABNORMAL COMBUSTION COOLING OF END GAS ZONE (KNOCKING) COOLING OF EXHAUST VALVE (PRE-IGNITION) COOLING OF SPARK PLUG (TYPE OF SPARK PLUG AND PLACING)

10. EMISSIONS CO & HC OXIDATION ARE AFFECTED BY HEAT TRANSFER

11. TURBOCHARGER PERFORMANCE THE TEMPERATURE OF THE EXHAUST GASES AFFECTS THE PERFORMANCE OF THE TURBOCHARGER

12. MECHANICAL EFFICIENCY FRICTION IS AFFECTED BY HEAT TRANSFER AND IN RETURN AFFECTS HEAT TRANSFER

13. MECHANICAL EFFICIENCY FAN & WATER PUMP SELECTION AND POWER ARE AFFECTED BY HEAT TRANSFER

14. MODES OF HEAT TRANSFER 1) CONDUCTION BETWEEN MATING ENGINE COMPONENTS

15. MODES OF HEAT TRANSFER 2) CONVECTION BETWEEN GAS & CYLINDER SURFACE

16. MODES OF HEAT TRANSFER 3) RADIATION BETWEEN SOOT & CYLINDER SURFACE IN CI ENGINES

17. HEAT TRANSFER FROM THE WORKING GAS TO THE CYLINDER WALLS

18. EMPIRICAL RELATIONSHIP WAS PROPOSED BY ANNAND

22. HEAT TRANSFER IS TO ; 1) CYLINDER HEAD 2) PISTON TOP 3) CYLINDER LINER EACH AREA HAS A DIFFERENT AND APPROXİMATELY CONSTANT SURFACE TEMPERATURE. THESE TEMPERATURES WILL VARY SLIGHTLY WITH RESPECT TO THE TYPE OF ENGINE THE SWING OF CYLINDER HEAD TEMPERATURE IS APPROXIMATELY 10 C

23. HEAT TRANSFER AREAS CYLINDER HEAD AND PİSTON TOP : LINER AREA

24. PROPERTIES