大套一站轴流泵装置事故飞逸特性研究

发布时间：2018-05-04 11:34

本文选题：飞逸 + 轴流泵　；参考：《中国农村水利水电》2017年06期

【摘要】：针对事故飞逸的研究对泵装置安全运行十分重要。结合轴流泵装置事故飞逸状态的特点,采用CFD计算软件FLUENT,利用基于有限体积法的动网格技术对大套一站轴流泵装置的飞逸状态进行了三维瞬态流动的数值模拟。获得了轴流泵装置飞逸状态下的内特性状态及外特性参数,同时在不同净扬程下对装置进行飞逸数值计算,发现飞逸转速随净扬程的升高而逐渐增大,叶片轴向力及进出水边的撞击与脱流亦随净扬程升高而增加。飞逸转速数值模拟与模型试验结果对比显示:飞逸转速随净扬程的变化规律与模型实验结果吻合较好,误差在5%以内,本次数值模拟具有较好的准确性。动网格技术能够较好地应用于轴流泵装置飞逸状态下内部流场的动态变化的数值模拟,其结果可为飞逸状态的研究提供了理论参考。
[Abstract]:The research of accident flight escape is very important to the safe operation of pump device. Combined with the characteristics of the accident flight state of the axial flow pump device, the 3D transient flow of the axial flow pump device was simulated by using the dynamic grid technology based on the finite volume method and the CFD calculation software fluent. The internal and external characteristic parameters of the axial flow pump device are obtained. At the same time, the flight escape value of the device is calculated under different net heads. It is found that the flight escape speed increases with the increase of the net head. The axial force of the blade and the impingement and deflow of the inlet and outlet edge also increased with the increase of the net head. The results of numerical simulation and model test show that the variation law of flight escape speed with net lift is in good agreement with the result of model experiment, and the error is less than 5%. The numerical simulation has good accuracy. The dynamic grid technique can be applied to the numerical simulation of the dynamic change of the internal flow field under the flight state of the axial flow pump device, and the results can provide a theoretical reference for the study of the flight escape state.
【作者单位】：盐城市通榆河枢纽工程管理处;河海大学能源与电气学院;
【分类号】：TV675

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