循环工况下变矩器叶片角设计空间的性能优化

摘要

为解决整机循环工况与液力变矩器的匹配问题,并建立变矩器设计参数与整机工况的动力学映射关系,本文提出循环工况条件下变矩器叶片角设计空间的性能优化方法.该方法在整机物理实验条件下,以其变矩器的统计循环工况加权效率为评价目标,利用变矩器一元束流理论及其流固耦合仿真结果构建变矩器性能模型,对变矩器叶片角设计变量进行优化.优化过程中以整机V型和T型典型工况及双涡轮变矩器为研究对象,在变矩器流固耦合仿真精度得到台架实验验证的前提下,证明优化后变矩器统计循环工况加权效率分别提升2.64%和2.48%.该方法简易性地建立了整机与变矩器叶片角设计参数间的一体化动力学匹配关系,对同类面向主机的配件定制化设计具有工程化指导价值.%To solve the matching problem between driving cycle and torque converter and to build the dynamics mapping relationship between the design parameters of torque converter and working condition , a performance opti-mization method for the design space of a torque converter's blade angle under the condition of driving cycle was proposed.In a physical experiment , the statistics driving cycle weighted efficiency of the torque converter was taken as the evaluation objective .A performance model was built by using one-dimensional flow theory and the fluid-solid coupling simulation result of the torque converter .The blade angle design variables of the torque converter were op-timized.Typical working conditions of V and T , and the torque converter with double turbines were the research object during the optimization .The statistics driving cycle weighted efficiency improved by 2.64%and 2.48%, re-spectively , as verified by the precision of the fluid-solid coupling simulation through a bench experiment on the torque converter .An integration dynamics mapping relationship between the whole machine and the blade angle de-sign variables was established in a simple manner .The method has good engineering guidance value for the custom-ized design of a machine with congeneric fittings .