SI-engine design concept for reducing cyclic variations

Ken Naitoh, Yuji Kaneko, Kazuya Iwata

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Fluid-dynamic principle for obtaining relatively stable combustion is found by performing cycle-resolved computations of turbulent flows in engines. Cycle-resolved computations are performed by using the implicit large eddy simulation (ILES) code, which we have proposed earlier. Calculations over continuous cycles show us the existence of "silent domain" in the engine cylinder, having weak cyclic-variations of flow. Time-dependent velocities averaged over six cycles, mean velocities, are also small in the silent domain. Moreover, we examine further on why cyclic variations of flow is weaker in the silent domain. This brings us a way for controlling cyclic variations for several engines.

Original languageEnglish
JournalSAE Technical Papers
DOIs
Publication statusPublished - 2005 Jan 1
Event2005 SAE World Congress - Detroit, MI, United States
Duration: 2005 Apr 112005 Apr 14

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Engines
Large eddy simulation
Engine cylinders
Fluid dynamics
Turbulent flow

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

SI-engine design concept for reducing cyclic variations. / Naitoh, Ken; Kaneko, Yuji; Iwata, Kazuya.

In: SAE Technical Papers, 01.01.2005.

Research output: Contribution to journalConference article

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