Modelling and analysis of the vibro-acoustic coupling behaviours of the cylinder liner-water jacket system towards cavitation prediction

Dong Liu, Guoxing Li, Nannan Sun, Guixiang Zhu, Lintao Li, Tie Wang, Fengshou Gu

Research output: Contribution to journalArticlepeer-review

Abstract

Cylinder liner cavitation has a profound effect on performance, efficiency, and reliability, posing a major challenge to the advancement of diesel engine technology. Cavitation generation involves complex energy transfer and the interaction of multiple physical fields, particularly the strong coupling effect between the cylinder liner and water jacket. This study proposes a novel cavitation prediction method that integrates piston tribo-dynamics, cylinder liner dynamics, and water jacket acoustics. The vibro-acoustic coupling behaviour of a cylinder liner-water jacket system under piston slaps was investigated. The coupling relationship between the liner vibration and coolant pressure was revealed. The variation laws of vibration and cavitation risk factor with the acoustic parameters were systematically analysed. The results indicate that the added mass and damping effects of the fluid can significantly affect the dynamic characteristics of the cylinder liner. The high negative pressure in the water jacket resulted from the superposition of vibration-generated radiated waves and boundary-reflected acoustic waves. The dynamic behaviour of the cylinder liner-water jacket system is closely related to the coupled modes and acoustic boundaries. These results provide a valuable reference for the coupled optimisation of vibration and cavitation inhibition in diesel engines.

Original languageEnglish
Article number112307
Number of pages21
JournalMechanical Systems and Signal Processing
Volume225
Early online date8 Jan 2025
DOIs
Publication statusE-pub ahead of print - 8 Jan 2025

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