- Author
-
Pitz, W. J.
|
Westbrook, C. K.
- Title
- Modeling Chemical Kinetic Aspects of Engine Knock.
- Coporate
- Lawrence Livermore National Lab., Livermore, CA
- Contract
- W-7405-ENG-48
- Book or Conf
- Combustion Institute/Western States Section. Spring Meeting, 1984. April 2-3, 1984,
Boulder, CO,
1-24 p.,
1984
- Keywords
-
engines
|
engine knock
- Abstract
- A chemical kinetics oxidation mechanism for n-butane is employed to study hydrocarbon autoignition related to engine knock. A low temperature submechanism has been added to a previously develped high temperature mechanism in order to examine the importance of low temperature reaction paths in autoignition. A series of calculations follows reactions taking place in a sample of end-gas that is subjected to the pressure and temperature history observed in an actual engine. Prediced autoignition times compare very well those experimentally measured by Smith et al, (1984). However, inclusion of a low temperature submechanism did not affect the predicted autoignition times. Controlling chemical reaction paths are identified. Autoignition was found to be particularly sensitive to reactions involving the production and consumption of HO2.