液力变矩器泵轮内流场非定常流动现象研究

发布时间：2018-04-26 12:32

本文选题：液力变矩器 + 计算流体力学　；参考：《机械工程学报》2016年14期

【摘要】：液力变矩器内部为复杂的三维非定常湍流流动,为分析变矩器泵轮内部三维非定常流动特性,建立液力变矩器非定常计算流体力学(Computational fluid dynamics,CFD)仿真分析模型,并通过激光多普勒测速(Laser Doppler anemometry,LDA)技术手段对该模型进行验证分析。研究泵轮转速800 r/min,速比为0.6工况下,不同涡轮和导轮位置,对于泵轮内流场非定常流动现象的影响。结果表明:该非定常CFD模型结果与LDA测试结果相吻合,且能够较为准确地反映泵轮内流场非定常流动状态,作为泵轮流场的上游,相对于涡轮对泵轮内部流动的影响,导轮对泵轮内流动状态的影响较大,并主要影响泵轮入口面附近。涡轮主要影响泵轮内流场中间面到出口面的尾流低速区,但影响幅度相对于导轮较小。
[Abstract]:The fluid torque converter is a complicated three-dimensional unsteady turbulent flow. In order to analyze the three-dimensional unsteady flow characteristics in the pump wheel of torque converter, a simulation analysis model of unsteady computational fluid dynamics (CFD) of hydraulic torque converter is established. The model was verified and analyzed by laser Doppler velocimetry and laser Doppler anemometry. The effects of different turbine and guide wheel positions on the unsteady flow in the pump wheel are studied at the speed of 800 r / min and the speed ratio of 0.6. The results show that the unsteady CFD model is consistent with the LDA test results, and can accurately reflect the unsteady flow state in the pump wheel. As the upstream of the pump rotation field, the effect of the turbine on the flow inside the pump wheel can be compared with that of the turbine. The guide wheel has a great influence on the flow state in the pump wheel, and mainly affects the inlet surface of the pump wheel. The turbine mainly affects the wake low speed zone from the middle surface to the outlet surface of the pump wheel, but the influence range is smaller than that of the guide wheel.
【作者单位】：北京理工大学机械与车辆学院;中国北方车辆研究所;
【基金】：国家自然科学基金资助项目(51475041)
【分类号】：TH137.332

【相似文献】