CFD Calculation of Pressure Rise Due to Internal AC and DC Arcing in a Closed Container
CFD Calculation of Pressure Rise Due to Internal AC and DC Arcing in a Closed Container
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DOI：
10.1109/tpwrd.2011.2108320
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发表时间：
2011-03
影响因子：
4.4
通讯作者：
M. Iwata;Shin-ichi Tanaka;T. Ohtaka;T. Amakawa;K. Anantavanich;Gerhard J. Pietsch
中科院分区：
文献类型：
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作者：
M. Iwata;Shin-ichi Tanaka;T. Ohtaka;T. Amakawa;K. Anantavanich;Gerhard J. Pietsch
本文介绍了用计算流体力学方法对封闭容器中强流电弧引起的压力上升和压力传播的计算结果。通过改变电流频率（50和60 Hz的交流和直流）和电弧能量输入（高达约1000 kJ）来计算容器内不同位置处的压力发展。容器内AC/50 Hz的局部压力振荡幅度超过DC。从容器内压力振荡周期和声速分布两方面得出以下结论。随着电弧能量的增加，由于电弧功率振荡与壁面反射的压力波之间的共振效应，压力幅值增加。当电弧能量达到约500 kJ的值时，压力振幅显著上升。这被认为是由于容器壁附近的压力波的低传播速度引起的压力波在容器壁附近的叠加。为了公共安全，在设计电力设备时有必要考虑这一现象。
Computational fluid dynamics calculation results of pressure rise and propagation due to high-current arcs in a closed container are described. The pressure developments at different locations within the container are calculated by changing the current frequency (ac of 50 and 60 Hz, and dc) and the electric arc energy input (up to approximately 1000 kJ). The local pressure oscillation amplitude for AC/50 Hz within the container exceeds that for dc. From the pressure oscillation period and the sound speed distribution in the container, the following conclusions are made. With growing electric arc energy, the pressure amplitude increases because of the resonance effect between the arc power oscillation and pressure waves reflected on the walls. When the electric arc energy reaches a value of around 500 kJ, the pressure amplitude rises significantly. This is considered attributable to superimposition of pressure waves near the container wall caused by low propagation velocity of the pressure waves near the wall. It is necessary to consider this phenomenon for public safety when designing electric power equipment.