Iso-Octane

Iso-Octane Experimental Data

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

Nour Atef, Goutham Kukkadapu, Samah Y. Mohamed, Mariam Al Rashidi, Colin Banyon, Marco Mehl, Karl Alexander Heufer, Ehson F. Nasir, A. Alfazazi, Apurba K. Das, Charles K. Westbrook, William J. Pitz, Tianfeng Lu, Aamir Farooq, Chih-Jen Sung, Henry J. Curran, S. Mani Sarathy a, “A Comprehensive iso-octane combustion model with improved theromchemistry and chemical kinetics,” Combustion and Flame 178, 111-134 (2017). doi:10.1016/j.combustflame.2016.12.029

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

Parameters for file hl.txt for case # 1 – 6

Volume histories for case # 1 – 6

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.