DME

Dimethyl ether Autoignition Experimental Data

NOTE: This dataset has to be interpreted in conjunction with the article below:

G. Mittal, M. Chaos, C. J. Sung, and F. L. Dryer, “Dimethyl Ether Autoignition in a Rapid Compression Machine: Experiments and Chemical Kinetic Modeling,” Fuel Processing Technology 89 (12), 1244-1254 (2008). doi:10.1016/j.fuproc.2008.05.021

Molar Compositions of Gas Mixtures Investigated

    DME

    O2     

    N2     

     φ     

1

7

27

0.428

1

4

30

0.750

1

2

32

1.500

Table of Experimentally Measured Ignition Delay Data

  • P0 = Initial pressure, torr
  • T0 = Initial temperature, K
  • PC = Pressure at TDC, bar
  • TC = Temperature at TDC, K
  • t 1 = First stage ignition delay, ms
  • t 2 = Total ignition delay, ms

Ignition delay data (xls, 45 kB)

Experimental Pressure Traces

Heat Loss Parameters

  • For a given mixture with known P0 and PC from the ‘ignition delay data’ table above, first identify the case number from the file below

Heat Loss Parameters

Case numbers file

  • With the known case numbers, identify the heat loss parameters from the file given below, and copy the parameters to a file with the title hl.txt in the same directory which has SENKIN

Case numbers file

Heat loss parameters for all cases

  • 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.
  • 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.