CFD research on runaway transient of pumped storage power station caused by pumping power failure
CFD research on runaway transient of pumped storage power station caused by pumping power failure
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DOI：
10.1088/1757-899x/52/5/052027
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
L. G. Zhang;D. Zhou
中科院分区：
文献类型：
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作者：
L. G. Zhang;D. Zhou
为了研究抽水断电引起的抽水蓄能电站暂态失控问题，对整个流动系统的几何模型进行了三维非定常数值模拟。通过数值计算，得到了测点单位转速、流量、静压等参数的变流形态及变化规律，并与实验数据进行了比较。数值计算结果表明，失控速度与实验数据吻合较好，误差为3.7%。机组经历泵工况、制动工况、涡轮工况和失控工况，流量特性变化剧烈。在失控状态下，通道内静压脉动非常强烈，其频率与失控速度有关。
To study runaway transient of pumped storage power station caused by pumping power failure, three dimensional unsteady numerical simulations were executed on geometrical model of the whole flow system. Through numerical calculation, the changeable flow configuration and variation law of some parameters such as unit rotate speed,flow rate and static pressure of measurement points were obtained and compared with experimental data. Numerical results show that runaway speed agrees well with experimental date and its error was 3.7%. The unit undergoes pump condition, brake condition, turbine condition and runaway condition with flow characteristic changing violently. In runaway condition, static pressure in passage pulses very strongly which frequency is related to runaway speed.