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中国电机工程学报 2006, 26(1) 146-150 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电工电机 |
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SF6断路器吹弧气体流动的边界元数值计算中基本解的求取 |
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王尔智 陶瑞民 |
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沈阳工业大学电气工程学院 新余高等专科学校工程系 |
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摘要：
SF6高压断路器开断过程中灭弧室内的吹弧气体是一种非定常，可压缩流动。这种流动是用抛物-双曲型N-S方程或欧拉方程来描述的。由于至今尚未求得此方程组的基本解而无法考虑用边界元法对该种气体流动进行数值求解。文中针对描述该种气体流动的欧拉方程，应用数学理论和方法，在已知质量方程与运动方程的奥森解的基础上，推导出描述断路器灭弧室吹弧气体非定常可压缩流动的欧拉方程的基本解。作为数值模拟实例，文中对550kV SF6断路器空载开断过程中吹弧气体流动规律进行了数值模拟，其结果证明文中导出的基本解是正确的，从而为进一步开发求解非定常可压缩气体流动的边界元数值计算法奠定了基础。 |
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关键词：
SF6高压断路器
基本解
非定常可压缩流动
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Investigation on Basic Solution for Numerical Calculation of Gas Blast Flow in SF6 Circuit Breaker by Boundary Element Method |
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Abstract:
During the breaking process of SF6 high voltage circuit breaker, the gas blast in arc quenching chamber is a kind of time dependent、 compressible flow of fluid described by a parabola-hyperboloid type N-S or Euler equation set. The numerical solution of this kind of partial differential equation by the Boundary Element Method has been unable to be considered for the reason that the basic solution of this equation set has not been found. The basic solution of Euler equation describing the time-dependent compressible flow of fluid has been deduced by mathematic theory and method based on knowing the Aosen solution of mass and kinetic equations. A 550kV SF6 circuit breaker has been taken as an example, the gas blast flow in no-load breaking process has been simulated, the results show that the basic solution of Euler equation set derived is correct, which lays the foundation for developing the Boundary Element Method of numerical solution for the time-dependent compressible flow of fluid. |
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Keywords:
SF6 high voltage circuit breaker
Basic solution
Time-dependent compressible flow of fluid
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收稿日期 2005-02-01 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 王尔智 |
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作者简介: |
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作者Email: spuwang@mail.sy.ln.cn |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．魏俊梅 林莘.SF6高压断路器压力特性与机械特性耦合数值模拟[J]. 中国电机工程学报, 2007,27(15): 110-116 |
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| Copyright by 中国电机工程学报 |
