Analysis of Gas Flow Properties in SF<sub>6</sub>/N<sub>2</sub> Mixture Interrupter

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Analysis of Gas Flow Properties in SF₆/N₂ Mixture Interrupter

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- Analysis of Gas Flow Properties in SF₆/N₂ Mixture Interrupter
- High VoltageApparatus Issue 3, Pages: 29-36(1992)
- 作者机构：
  
  1. 西安交通大学
  2. 西安交通大学 710049
- 作者简介：
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- Published：1992
- 稿件说明：
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[1]海涛,胡万平,王其平.SF_6/N_2混合气体灭弧室中气流特性的计算分析[J].高压电器,1992(03):29-36.

Analysis of Gas Flow Properties in SF₆/N₂ Mixture Interrupter[J]. High voltageapparatus, 1992, (3): 29-36.
[1]海涛,胡万平,王其平.SF_6/N_2混合气体灭弧室中气流特性的计算分析[J].高压电器,1992(03):29-36. DOI：

Analysis of Gas Flow Properties in SF₆/N₂ Mixture Interrupter[J]. High voltageapparatus, 1992, (3): 29-36. DOI：

摘要

以能量平衡方程为基础

建立了分析压气式SF

断路器灭弧室喷口气流场的数学模型

在不同比例的SF

混合气体条件下

对上游区（压气缸）气体压力和温度以及喷口喉道内的气流量进行了数值计算

通过改变混合比、基压、喷口直径和下游扩张角等参数进行大量计算

最终达到了混合气体条件下产生及维持与纯SF

气体接近或相同的SF

质量流量的目的

以确保所需的灭弧能力

Abstract

Based on the energy conservation equation

a mathematical simulation program to obtain the dynamic characteristics of nozzle flow field in a puffer type SF6 circuit breaker has been developed. The pressure and temperature rise in puffer cylinder and the gas flow transient in nozzle were calculated for the SF6/N2 mixture in various values of mixing ratio. The results show that it is possible to increase the net SF6 mass flow in SF6/N2 mixture to the same level as that in pure SF6 gas and to ensure the essential interruption capability by modifying initial pressure of chamber

the value of mixing ratio and the configuration of arc chamber.

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State Grid (Changzhou) Electric Power Equipment Quality Inspection and Testing Center

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Graduate School at Shenzhen,Tsinghua University

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Analysis of Gas Flow Properties in SF6/N2 Mixture Interrupter

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Analysis of Gas Flow Properties in SF₆/N₂ Mixture Interrupter