Tumbling flow in a pentroof-type combustion chamber of an internal combustion engine (2nd report, breakdown of tumble near TDC of compression stroke)

Yoshisuke Hamamoto, Eiji Tomita, Zhong Zhang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In a four-value spark-ignition engine with pentroof combustion chamber, the tumbling flow and its turbulence in compression stroke were measured with a laser-Doppler velocimeter in two kinds of compression ratios under the condition of motoring. The main results are as follows. In the latter stage of the compression stroke under the condition of higher compression ratio , the tumbling flow is broken down to several small-sizes eddies because of narrow top clearance and the turbulence intensity increases. Then the power spectrum of the turbulence is increased in the higher frequency region at the top dead center of the compression stroke. In the early stage of the compressions stroke, the effect of the compression ratio on the power spectrum of the turbulence does not appear due use of the same intake system.

Original languageEnglish
Pages (from-to)2596-2599
Number of pages4
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume59
Issue number564
Publication statusPublished - Aug 1993
Externally publishedYes

Fingerprint

Barreling
internal combustion engines
combustion chambers
Combustion chambers
strokes
Internal combustion engines
compression ratio
Turbulence
breakdown
turbulence
Power spectrum
power spectra
intake systems
laser doppler velocimeters
spark ignition
Laser Doppler velocimeters
Intake systems
clearances
engines
vortices

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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AU - Tomita, Eiji

AU - Zhang, Zhong

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