Presentation is loading. Please wait.

Presentation is loading. Please wait.

AE 427 THERMODYNAMIC CYCLE SIMULATION Prof.Dr. Demir Bayka.

Similar presentations


Presentation on theme: "AE 427 THERMODYNAMIC CYCLE SIMULATION Prof.Dr. Demir Bayka."— Presentation transcript:

1 AE 427 THERMODYNAMIC CYCLE SIMULATION Prof.Dr. Demir Bayka

2 COMPRESSION THE CLEARANCE VOLUME CONTAINS RESIDUAL GASES FROM PREVIOUS CYCLE SOME AMOUNT OF EXHAUST GASES MAY BE INDUCED BY RECIRCULATION (EGR) AIR/FUEL MIXTURE IS INDUCED

3 TEMPERATURE OF THE RESIDUAL GASES WILL BE HIGH (~1500 K) TEMPERATURE OF THE RECIRCULATED EXHAUST GASES WILL BE LOWER (~900 K) TEMPERATURE OF THE AIR/FUEL MIXTURE WILL BE LOWEST (~300 K) COMPRESSION

4 FOR A MIXTURE OF GASES MOLECULAR WEIGHT: SPECIFIC GAS CONSTANT where R 0 =8.314 kJ/kmol-K

5 SPECIFIC HEAT OF A GAS MIXTURE

6 SPECIFIC HEAT RELATIONS units are kJ/kmol-K also

7 ALGORITHMS coefficients A ij can be obtained from pages 131 & 133 of your reference book

8 AIR = OXYGEN + NITROGEN (and some CO2 and Argon) CO2 and Argon may be assumed as part of Nitrogen such that

9 FOR UNIT VOLUME OF O units of AIR = O units of N 2 ’ O 2 is approximately 21% of AIR (on a volume basis)

10 COMPOSITION OF UNBURNED MIXTURE RESIDUAL GAS FRACTION (f res )

11 COMPOSITION OF UNBURNED MIXTURE RECIRCULATED EXHAUST GAS (EGR)

12 COMPOSITION OF BURNED GAS FRACTION IN UNBURNED MIXTURE (at 1700 K)


Download ppt "AE 427 THERMODYNAMIC CYCLE SIMULATION Prof.Dr. Demir Bayka."

Similar presentations


Ads by Google