模型水泵水轮机长短叶片动应力及压力的测试方法研究

Study of the Measurement Method on the Dynamic Stress and Pressure of Model Pump-turbine Spliter Blades

  • 摘要: 水泵水轮机工况转换频繁,运行条件较常规水轮机恶劣,随着抽水蓄能机组单机容量和尺寸逐步提高,运行稳定性愈发受到关注。本文对模型水泵水轮机转轮叶片动应力和叶片表面压力进行测量方法的研究,从而评估各工况下水泵水轮机叶片应力和压力分布规律,有助于提高真机转轮的刚强度和水力设计,可为真机安全运行提供重要参考。本文结合水力CFD流体仿真计算和强度计算确定叶片测量的位置,设计叶片测量线路的铺设、测试系统的供电系统、数据的采集系统。

     

    Abstract: The operation conditions of the pump-turbine are changed frequently and are worse than the conventional turbine. The operation stability of the pump-turbine is more focused with the the incremental unit capacity and the pump-turbine runner diameter. The research of the measurement method for the dynamic stress and the pressure of the model pump-turbine splitter runner blades is performed to evaluate the stress and pressure distribution under the various operation conditions, it is optimized for the turbine mechanical and hydraulic computation, the operation references are provided for the prototype pump-turbine also. In this paper, the measurement positions of the blades are determined based on the hydraulic CFD and mechanical computation, the measurement method of dynamic stress and pressure of splitter model pump-turbine runner blades is studied, the reasonable cables leading, measurement system power supply and the data acquisition are designed.

     

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