Towards accurate CFD simulation of highly thermally stressed journal bearings in turbochargers: heat transfer, cavitation, and two-phase flow

článek ve sborníku mimo WoS a Scopus

en

This paper presents a high-accurate CFD model of a hydrodynamic journal bearing designed for high-speed turbocharger applications. The simulation includes two-phase flow (oil–air mixture), cavitation effects, and conjugate heat transfer to capture the complex thermo-fluid interactions within the bearing. A structured 3D mesh with over 8 million cells resolves critical thin-film regions and thermal gradients across the shaft and housing. The model predicts pressure distribution, temperature fields, and cavitation zones with high spatial accuracy. The disadvantages are high computational complexity, difficult calibration and limited applicability for fast design iterations.

This paper presents a high-accurate CFD model of a hydrodynamic journal bearing designed for high-speed turbocharger applications. The simulation includes two-phase flow (oil–air mixture), cavitation effects, and conjugate heat transfer to capture the complex thermo-fluid interactions within the bearing. A structured 3D mesh with over 8 million cells resolves critical thin-film regions and thermal gradients across the shaft and housing. The model predicts pressure distribution, temperature fields, and cavitation zones with high spatial accuracy. The disadvantages are high computational complexity, difficult calibration and limited applicability for fast design iterations.

hydrodynamic bearing; CFD; CHT; two-phase fluid; cavitation

04.09.2025

MENDELU, Faculty of AgriSciences, Department of Technology and Automobile Transport

Brno

978-80-7701-051-1

KOKA 2025

1

161–167

8