基于复杂性测度的变矩器流场仿真湍流模型稳健性分析

为研究液力变矩器流场仿真常用湍流模型的稳健性问题,对基于ANSYS/CFX的某液力变矩器流场仿真系统,分别采用15种湍流模型进行抽样计算。并基于蒙特卡罗法,对系统输入变量进行服从正态分布的微小扰动,分别在低速和高速两种计算工况下,对每种湍流模型进行200次抽样。基于复杂性测度理论,将获得的输入输出数据进行了复杂性分析,在此基础上,对仿真系统拓扑结构稳健性和输出变量的稳健性进行了计算,并给出了各种湍流模型稳健性的定量指标。分析结果表明:在变矩器流场性能仿真中,剪应力输运模型的综合稳健性最好。

Complexity-based robustness analysis of turbulence model in torque converter flow field simulation

To study the robustness of commonly used turbulence models in flow field simulation of hydrodynamic torque converter,fifteen turbulence models were taken to conduct sampling and calculation in a torque converter flow field simulation system of based on ANSYS/CFX.Using Monte Carlo method,the input variables were slightly disturbed using a normal distribution function.Each turbulence model was sampled 200 times,respectively in low and high calculation speed conditions.According to the complexity measurement theory,the complexity of the acquired input and output variables was analyzed.The robustness of the simulation system and its output variables were calculated,by which the quantitative indicators of robustness for each turbulence model were given.Analysis results show that the shear stress model has the best overall robustness in torque convert flow field simulation.