WIT Press


Influence Of Wall Heat Transfer On Knocking In Gasoline Engines

Price

Free (open access)

Paper DOI

10.2495/HT960231

Volume

12

Pages

9

Published

1996

Size

620 kb

Author(s)

S. Hajireza & B. Sunden

Abstract

The aim of this work is to develop a numerical calculation procedure for studies of two-dimensional, unsteady and compressible flow and heat transfer of the end-gas in a combustion chamber as it is compressed by a progressing flame front. Initially a Cartesian coordinate system is employed and the flame front is assumed to be straight. An implicit finite volume computer code based on the SIMPLE-algorithm is used. Preliminary prediction of variations of temperature, pressure and density as a function of time (crank angle) are presented. 1 Introduction Knock occurs in gasoline engines especially during high load and low rotation speeds. Knock is believed to occur as the result of compression of the end-gas in the combustion chamber by the progressing flame front. If the temperature in the end-gas region become

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