An Examination of the Effects of Charge Inhomogeneity on the Compression Ignition of Fuel-Air Mixtures University of Calgary

Format:

Conference/Event

Author/Creator:

Chen, Kai, author.

Conference Name:

International Fall Fuels & Lubricants Meeting & Exposition (1998-10-19 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1998

Summary:

The paper examines the rapid compression process of methane-air mixtures while using a zero-dimensional simulation and a detailed chemical kinetic scheme involving 137 reaction steps for methane-air combustion with an account made for heat transfer. The results of this simulation are compared with the corresponding values obtained when using multi-dimensional CFD simulation of the temporal and spatial evolution of the physical properties inside the cylinder while using KIVA-3 code both for reactive and non-reactive "methane"-air mixtures. The reaction rate data used in the code were overall rates of varyingly fitted data based on results of the full detailed kinetic scheme under the same local conditions. The effects of the non-uniformity in the charge physical properties due to heat transfer and compression effects on the evolution of the chemical processes leading to autoignition are presented and discussed. It is shown that major errors may result from the inadequate modelling of the nonuniform properties of the reactive charge during compression. These have serious implications to the interpretation of autoignition and knock phenomena in engines as well as the derivation of chemical kinetic parameters of reactive systems when obtained from observations made in motoring engines or rapid compression ignition apparatus

Notes:

Vendor supplied data

Publisher Number:

982614

Access Restriction:

Restricted for use by site license