乘用车液力变矩器研究现状与趋势

Research status and development of torque converters in passenger vehicles

摘要:

首先,概述了液力变矩器研发与应用中出现的新趋势。阐述了液力变矩器内流场测量与仿真计算、性能优化与关键结构参数分析以及液力性能预测计算等研究领域的研究概况。展示了液力变矩器相关研究领域的最新研究成果。主要包括：基于非均匀有理B样条的液力变矩器叶栅系统参数化建模方法,运用计算流体力学数值计算结果改进一元束流性能预测模型,基于格子Boltzmann方法的叶轮内流场仿真技术。最后,结合上述研究成果,展望并讨论了液力变矩器叶栅系统设计与分析自动化集成技术的实现方向。

关键词:液力变矩器;叶栅系统设计;流场仿真;一元束流理论;非均匀有理B样条

Abstract:

Firstly, new trends of research and applications of torque converters are overviewed in this paper. Then, the technology of measurement and numerical simulation of internal flow field, optimization and prediction of hydraulic performance as well as analysis of key design parameters of torque converters are discussed. Furthermore, the current research achievements are brought forth, such as parametric modeling of cascade system based on the non-uniform rational B-spline, modification of hydraulic prediction model based one-dimension flow theory according to the results obtained from computational fluid dynamic analysis and internal flow simulation in the turbomachinery based on the lattice-Boltzmann method. Finally, based on the current research achievements, the way to realize the technology of automated integration of cascade design and analysis is presented.

Key words:Torque Converter; Design of cascade system; Flow field simulation; One-dimension flow theory; Non-uniform rational B-spline