Assignment 2
1.To Run the case at 1800 rpm and list down important parameters
at 1800rpm
- air flow rate
- BMEP
- BSFC
- In-cylinder pressure
2. Increase the power output at 3600 rpm by 10%
at 3600 rpm
changes made to improve the power of the engine to 10%
parameters changed to improve power
| stroke length | 86.07 | 89 |
| bore diameter | 86 | 87.5 |
| compression ratio | 9.5 | 11 |
| fuel ratio | 14.5 | 12.5 |
in cylinder pressure for 3600rpm [improved power]
column one default values of 3600rpm,coloumn 2 changes made for improve power
Result:
| case | rpm | in cylinder pressure[bar] | BSFC[g/KW-hr] | air flow rate[Kg/hr] | BMEP[bar] | power[KW] |
| 1 | 1800 | 48.5 | 239.2 | 24.6 | 9.5 | 9.5 |
| 2 | 3600[default] | 58.32 | 241.8 | 58.6 | 11.1 | 16.7 |
| 3 | 3600[parameters varied to improve power] | 69.87 | 270.5 | 63.1 | 11.6 | 18.6 |
Conclusion:
power obtained in 1800 rpm is 9.5 KW.
power obtained in 3600 rpm (default) is 16.7 KW
power obtained in 3600 rpm (poewr improve case) is 18.6 KW
power improved 11.377%