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提出一种液力变矩器叶栅系统的优化设计方法,通过含有参数化设计与流场数值模拟环节的正交试验设计样本构建目标的响应曲面(RSM)近似模型,再由序列二次规划法(SQP)反复迭代并更新模型逼近最优解。结果表明该方法在工程设计上是有效的,并且证实了加大泵轮叶片内环出口角的扭曲角度可以有效地提高变矩器的变矩性能,但起动变矩比增大的同时最高传动效率会有所下降。
An optimization design method for a torque converter cascade system is proposed. An approximate RSM model of the target is constructed by using orthogonal test design samples with parametric design and numerical simulation of flow field. Then, a quadratic programming Law (SQP) repeatedly iteratively and update the model to approximate the optimal solution. The results show that the method is effective in engineering design and it is confirmed that increasing the torsion angle of the exit angle of the inner ring of the impeller blade can effectively improve the torque converter performance. However, when the starting torque ratio is increased and the maximum transmission Efficiency will decline.