NOTE: This dataset has to be interpreted in conjunction with the article below:
G. Mittal and C. J. Sung, “A Rapid Compression Machine for Chemical Kinetics Studies at Elevated Pressures and Temperatures,” Combustion Science and Technology 179 (3), 497-530 (2007). doi:10.1080/00102200600671898
Iso-Octane Autoignition
P0 = Initial pressure
T0 = Initial temperature
PC = Pressure at TDC
TC = Temperature at TDC
P0 = 331 torr
T0 = 297 K
Case # |
Molar Composition iC8H18/O2/N2/Ar |
PC (bar) |
TC (K) |
Ignition delay (ms) |
1 |
1/12.5/47/0 |
13.2 |
686 |
57.6 |
2 |
1/12.5/37.6/9.4 |
13.7 |
713 |
66 |
3 |
1/12.5/28.2/18.8 |
14.15 |
745 |
95 |
4 |
1/12.5/18.8/28.2 |
14.8 |
782 |
119 |
5 |
1/12.5/9.4/37.6 |
15.35 |
826 |
104 |
6 |
1/12.5/0/47 |
16.1 |
878 |
36 |
Experimental pressure traces for case # 1 – 6: rcm_p-t-isooctane
Parameters for file hl.txt for case # 1 – 6: hl_isooctane
Simulation Procedure
- Use the following program as the driver program for SENKIN: driver.f
- Specify initial pressure (P0), temperature (T0), composition in the SENKIN input file with VTIM keyword for calculations.
- Copy the file hl.txt, which contains parameters for heat loss, for the specific case in the program directory.
- Run the program
Note: Heat loss parameters are in the form of a polynomial. At long time after compression the polynomial may blow up to erroneous values. SENKIN calculations should be performed to a reasonable time which is sufficient for ignition to occur.