29권 8호 765-773 2021 [한국자동차공학회 논문집 ]
| 제목 | CFD를 활용한 동력분산식 고속전철용 감속기의 오일 처닝 해석 |
|---|---|
| 분야 | 변속기 및 동력전달장치 |
| 언어 | Korean |
| 저자 | 김기남(유진기공), 최상열(태성에스엔이), 김우택(태성에스엔이) |
| Key Words | Reduction gear unit(감속기), CFD(전산유체역학), MDM(Moving Deforming Mesh, 동적변형격자), VOF(Volume of Fluid), Convective heat transfer coefficient(대류열전달계수), EMU(KTX-이음) |
| 초록 |
For the purpose of sufficient lubrication and cooling of the gear unit when it comes to temperature increase due to frequent acceleration/deceleration, it is important to establish an optimum gear box design, such as oil path holes and baffles. In order to predict them and pursue design improvement, CFD simulation was carried out by using the Moving/Deforming Mesh(MDM) technique employed in Ansys Fluent for rotating geometries and Volume of Fluid(VOF) for the modeling of the multiphase flow regime. In the present study, the power distribution type reduction gear unit, which is being manufactured currently for installation in EMU-250 and EMU-300 high-speed train (260~320 km/h grades) was employed. As a result, the transient nature of highly violent multiphase flow by gear churning was simulated successfully with the suggested numerical schemes. Additionally, the temperature prediction of each part according to convective heat transfer induced by oiling flow and surface heat flux by gear loss assumption is described. |
| 원문(PDF) | 다운로드 Journal Site |