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为研究液力变矩器内泵轮、导轮和涡轮间动静干涉引起的三维非定常流动特性,利用滑移网格技术和RNG k-ε湍流模型计算液力变矩器内湍流流动,得到泵轮全流道内流体压力的主要特征。仿真结果表明:泵轮全流道内流体压力脉动明显;在涡轮转速不变的情况下,压力脉动峰值与半径成正比;在相同半径处,压力脉动峰值与涡轮转速成反比。此外,由压力脉动值的频谱分析结果可知:随涡轮转速或监测点半径变化,泵轮全流道内各监测点压力脉动的频率成分基本一致,但各影响频率成分所占的比例不同。
In order to study the three-dimensional unsteady flow characteristics caused by the static and dynamic interference between the impeller and stator in the torque converter, the turbulent flow in the torque converter is calculated by using the slip-grid technique and the RNG k-ε turbulence model. The main features of the fluid pressure in the full runner of the impeller. The simulation results show that the pressure pulsation in the whole flow passage of the pump impeller is obvious. The peak value of the pressure pulsation is proportional to the radius when the turbine speed is constant. The peak value of pressure pulsation is inversely proportional to the turbine speed at the same radius. In addition, the spectrum analysis of pressure pulsation shows that the frequency components of pressure pulsations at all monitoring points in the full runner of the pump are basically the same as the turbine speed or the radius of the monitoring point changes, but the proportions of the affected frequency components are different.