西安建筑科技大学学报(自然科学版)

以六氟化硫作为研究气体,以鲁地拉水电站主变室为参考对象制作试验台,通过小室试验分析了受限空间内六氟化硫在自然填充状态下不同泄漏量及不同泄漏位置时的浓度变化及分布规律,研究表明:当泄漏点位置在体源上表面中心时,受限空间内六氟化硫浓度随时间的变化过程可分为两个阶段:快速上升阶段和缓慢上升阶段,且泄漏量越大,近地面处的六氟化硫浓度越高,分层特性越明显; 当泄漏点位于体源上表面,但是偏离中心点时,受限空间内两侧的六氟化硫浓度值会相差较大,靠近泄漏口的一侧浓度较高,而远离泄漏口的一侧浓度较低; 当泄漏位置位于体源侧边时,受限空间内的六氟化硫浓度分布会呈现底层浓度高,扩散高度低的特点,且泄漏位置越低,底层的浓度越高.

Using SF6 as research gas, the test bench was made with the main transformer room of Ludila Hydropower Station as the reference object. The concentration variation and distribution of SF6 in confined space under different leakage amount and different leakage positions in natural filling state are analyzed.and the experimental results show that When the leak point is located at the center of the upper surface of the body source, the concentration variation of SF6 in the confined space can be divided into two stages: the fast rising phase and the slow rising phase, and the larger the leakage, The higher the concentration of SF6 near the ground, the more obvious the stratification characteristics; When the leak point is located on the upper surface of the body source, but the deviation from the center point, the concentration of SF6 on both sides of the confined space will be different, the concentration near the leak port is higher, and the side far from the leak port is lower; When the leakage position is located on the side of the body source, the concentration distribution of SF6 in the confined space will be characterized by high concentration of the bottom layer and low diffusion height, and the lower the leakage position, the higher the concentration of the bottom layer.

引言
1 试验设计与测试
2 结果分析
3 结论

图1 试验台构造
Fig.1 Test-bed structure

图2 主变室各断面测点分布图<br/>Fig.2 Schematic diagram of transversal surfaces measuring points

图2 主变室各断面测点分布图
Fig.2 Schematic diagram of transversal surfaces measuring points

表1 工况表
Tab.1 Test table

图3 不同泄露量时SF6浓度随时间变化图<br/>Fig.3 Variation of SF6 concentration with time at the different leakage

图3 不同泄露量时SF6浓度随时间变化图
Fig.3 Variation of SF6 concentration with time at the different leakage

图4 不同工况时不同高度最大浓度分布图<br/>Fig.4 SF6 maximum concentration at different heights under different condition

图4 不同工况时不同高度最大浓度分布图
Fig.4 SF6 maximum concentration at different heights under different condition

图5 工况4时SF6浓度随时间变化图<br/>Fig.5 variation of SF6 concentration with time under working condition 4

图5 工况4时SF6浓度随时间变化图
Fig.5 variation of SF6 concentration with time under working condition 4

图6 工况4时不同高度最大浓度分布图<br/>Fig.6 SF6 maximum concentration at different heights under working condition 4

图6 工况4时不同高度最大浓度分布图
Fig.6 SF6 maximum concentration at different heights under working condition 4

图7 工况5时SF6浓度随时间变化图<br/>Fig.7 variation of SF6 concentration with time under working condition 4

图7 工况5时SF6浓度随时间变化图
Fig.7 variation of SF6 concentration with time under working condition 4

图8 工况5不同高度最大浓度分布图<br/>Fig.8 SF6 maximum concentration at different heights under working condition 5

图8 工况5不同高度最大浓度分布图
Fig.8 SF6 maximum concentration at different heights under working condition 5

图9 工况4和工况5时SF6浓度随时间变化图<br/>Fig.9 Variation of SF6 concentration with time under working condition 4 and 5

图9 工况4和工况5时SF6浓度随时间变化图
Fig.9 Variation of SF6 concentration with time under working condition 4 and 5

图10 工况4和工况5时不同高度SF6最大浓度分布图<br/>Fig.10 SF6 maximum concentration at different heights under working condition 5

图10 工况4和工况5时不同高度SF6最大浓度分布图
Fig.10 SF6 maximum concentration at different heights under working condition 5

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备注

引言

1 试验设计与测试

2 结果分析

3 结论

期刊信息