Methodology for Considering the Influence of Rolling Element Bearings in CFD Oil Flow Simulations of Gearboxes using Rolling Element Bearing Sub Models
Research Topic
| Short Title | Rolling Element Bearing Sub-Models |
| Start of Project | Q2/2024 |
| Förderung | FVA-Nr. 1029/I, IGF-Nr. 01IF23143N Federal Ministry for Economic Affairs and Climate Action, BMWK |
| Project Partner | IMSE, RWTH Aachen |
| Contact | Dr.-Ing. T. Lohner |
Project Description
The aim of the research project is to develop a methodology for the efficient consideration of the retroactive influence of rolling element bearings on the gearbox oil flow using rolling element bearing sub-models. According to the current state of technology and research, the influence of rolling element bearings on the gearbox oil flow cannot be taken into account in CFD simulations with reasonable computing times due to the need for fine discretization.
The result of the research project is a method for creating rolling element bearing sub-models and a method for integrating them into CFD gearbox simulations. This improves the quality of the CFD gearbox simulation results, as the influence of rolling element bearings on the gearbox oil flow can be considered in a computationally efficient manner. The solution includes the description of flow variables on rolling element bearings, taking various bearing parameters into account. The influence of rolling element bearings on the gearbox oil flow is investigated experimentally. Rolling element bearing sub-models of various degrees of abstraction are created on the basis of the data.
The rolling element bearing replacement models are integrated into the CFD gearbox simulation using a universal exchange format. The focus here is on the SPH. The rolling element bearing sub-models are used in the CFD gearbox simulation and validated with experimental data. The exemplary CFD simulation of practical gearboxes is carried out.
Literatur
[Mor20] B. Morhard, D. Schweigert, M. Mileti, M. Sedlmair, T. Lohner, K. Stahl, Efficient lubrication of a high-speed electromechanical powertrain with holistic thermal management, Forsch Ingenieurwes 85 (2021) 443–456. doi.org/10.1007/s10010-020-00423-0.