CFD-simulation of no-load power losses and the oil distribution of spur gears

正齿轮空载功率损耗和油分布的 CFD 模拟

• 批准号: 389373218
• 负责人: Professor Dr.-Ing. Nikolaus Andreas Adams
• 金额: --
• 依托单位: Lehrstuhl für Aerodynamik und Strömungsmechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/389373218?language=en
• 关键词: CFD; simulation; no; load; power

No-load gear power losses account for a considerable proportion of the main losses in high-speed gears. Currently, there is no efficient method to quantify these losses. At present, em-pirical equations are used, despite these formulas could just provide roughly approximated values. No-load gear losses are affected by the current flow conditions in the gearbox. Again, there is no efficient method to predict these conditions. Consequently, the development orthe optimization of geared transmissions is impeded. The efficiency optimization in gear en-gineering could be remarkably improved by a precise and yet efficient predicting method. As an alternative to empirical equations, the most promising method is the use of computational fluid dynamics. The main aim of the proposed project is the development of an optimized and validated CFD simulation model based on the SPH method in order to predict the no-load gear losses and the oil distribution in geared transmissions. The results for the no-load losses will be validated by the measurements, whereas the simulated oil distribution is compared to the recordings made by a high-speed camera.In collaboration with the Institute of Machine Elements and the Institute of Aerodynamics and Fluid Mechanics of the Technical University of Munich, the interaction based SPH method will be optimized and compared to the Finite-Volume Method. Both methods have already been used by both institutes for similar applications.It has already been shown that the SPH method has great potential from a numerical point of view. By comparing the results with the Finite-Volume Method at the end of the project, an established base of evaluation will be created. The possibility of applying the SPH method for the prediction of no-load losses and the oil distribution in geared transmissions will be explored.In this project, potentials of CFD applications in the research field of gearbox simulation will be detected, which can reduce the time consuming and expensive experimental investigations in the future.

空载齿轮功率损耗在高速齿轮的主要损耗中占相当大的比例。目前，还没有有效的方法来量化这些损失。目前使用的是经验方程，尽管这些公式只能提供大致的近似值。空载齿轮损耗受齿轮箱内当前流动状况的影响。同样，没有有效的方法来预测这些情况。因此，齿轮传动的发展或优化受到阻碍。通过一种精确而有效的预测方法，可以显著提高齿轮工程的效率优化。作为经验方程的替代方法，最有前途的方法是使用计算流体动力学。本课题的主要目的是建立基于SPH方法的优化和验证的CFD仿真模型，以预测齿轮传动的空载齿轮损耗和油分布。空载损耗的结果将通过测量来验证，而模拟的油分布将与高速摄像机的记录进行比较。在与慕尼黑工业大学机械元件研究所和空气动力学与流体力学研究所的合作中，基于相互作用的SPH方法将被优化，并与有限体积方法进行比较。这两种方法已经被两个研究所用于类似的应用。从数值角度来看，SPH方法具有很大的潜力。通过在项目结束时将结果与有限体积法进行比较，将创建一个既定的评估基础。探讨了应用SPH方法预测齿轮传动系统空载损耗和油分布的可能性。在本项目中，将检测CFD在变速箱仿真研究领域的应用潜力，从而减少未来耗时和昂贵的实验研究。