✦ LIBER ✦

Cyclic variations and turbulence structure in spark-ignition engines

✍ Scribed by Philip G. Hill

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 1021 KB
Volume: 72
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(88)90098-3

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✦ Synopsis

Cyclic variations in pressure and burning time in a single cylinder spark-ignition engine have been determined as a function of equivalence ratio and engine speed. For the same operating conditions, measurements of turbulence intensity are available and these have been used with an estimate of the integral scale to estimate the magnitude of the Taylor microscale. It has been shown that the standard deviation in the burning time associated with the early stages of burning is predictable from knowledge of the Taylor microscale and the laminar burning velocity. This result is an implication of the Tennekes model of small scale turbulence and the Chomiak explanation of high flame propagation rate in regions of concentrated vorticity.

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