Piston slap induced pressure fluctuation in the water coolant passage of an internal combustion engine

Kazuhide Ohta, Xiaoyu Wang, Atsushi Saeki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Liner cavitation is caused by water pressure fluctuation in the water coolant passage (WCP). When the negative pressure falls below the saturated vapor pressure, the impulsive pressure following the implosion of cavitation bubbles causes cavitation erosion of the wet cylinder liner surface. The present work establishes a numerical model for structural-acoustic coupling between the crankcase and the acoustic field in the WCP considering their dynamic characteristics. The coupling effect is evaluated through mutual interaction terms that are calculated from the mode shapes of the acoustic field and of the crankcase vibration on the boundary. Water pressure fluctuations in the WCP under the action of piston slap forces are predicted and the contributions of the uncoupled mode shapes of the crankcase and the acoustic field to the pressure waveform are analyzed. The influence of sound speed variations on the water pressure response is discussed, as well as the pressure on the thrust sides of the four cylinders.

Original languageEnglish
Pages (from-to)329-344
Number of pages16
JournalJournal of Sound and Vibration
Volume363
DOIs
Publication statusPublished - Feb 17 2016

Fingerprint

internal combustion engines
coolants
pistons
Internal combustion engines
Pistons
Coolants
water pressure
cavitation flow
acoustics
Crankcases
modal response
linings
Acoustic fields
water
Water
uncoupled modes
acoustic coupling
Engine cylinders
Cavitation
implosions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Piston slap induced pressure fluctuation in the water coolant passage of an internal combustion engine. / Ohta, Kazuhide; Wang, Xiaoyu; Saeki, Atsushi.

In: Journal of Sound and Vibration, Vol. 363, 17.02.2016, p. 329-344.

Research output: Contribution to journalArticle

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