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为探究液力缓速器工作时其关键参数的变化规律,针对某液力缓速器的特殊结构,通过合理设置交互面,构建了带入出口边界的全流道流场仿真模型.在不同的转速与系统流量下进行仿真计算,根据仿真结果确定了反馈压力与出口压力随转速与系统流量的变化规律,并从束流理论的角度对结果进行解释.结合部分充液稳态流场仿真以及充液过程瞬态仿真,得到了充液过程中充液率的变化以及制动转矩、反馈压力随充液率的变化规律,能为液力缓速器制动转矩特性以及入出口压力、反馈压力等特性的建模与运用提供依据.
In order to explore the variation regularity of the key parameters of the hydrodynamic retarder, aiming at the special structure of a hydrodynamic retarder, the simulation model of the full flow field brought into the exit boundary is established through the rational setting of the interaction surface. And the system flow rate, the simulation results show that the feedback pressure and outlet pressure change with the speed and the system flow rate, and the results are explained from the beam theory.Combined with the partial liquid-filled steady-state flow field simulation As well as the transient simulation of liquid-filled process, the change of liquid-filling rate and the variation of braking torque and feedback pressure with the liquid-filling rate were obtained, which could be the characteristics of the hydraulic retarder’s braking torque, Pressure, feedback pressure and other characteristics of the modeling and use to provide the basis.