Influence of Pressure Ratios on Cold Gas Flow Field in HV SF<sub>6</sub> Circuit Breaker Nozzles

您当前的位置：

首页 >

文章列表页 >

Influence of Pressure Ratios on Cold Gas Flow Field in HV SF₆ Circuit Breaker Nozzles

更新时间：2025-07-09

- Influence of Pressure Ratios on Cold Gas Flow Field in HV SF₆ Circuit Breaker Nozzles
- Vol. 46, Issue 6, Pages: 122-127(2012)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM561
- Online First：10 June 2012，
  
  Published：2012
- 稿件说明：
移动端阅览
Influence of Pressure Ratios on Cold Gas Flow Field in HV SF₆ Circuit Breaker Nozzles[J]. 2012, 46(6): 122-127.
DOI：

Influence of Pressure Ratios on Cold Gas Flow Field in HV SF₆ Circuit Breaker Nozzles[J]. 2012, 46(6): 122-127. DOI：

摘要

为了辅助高压SF

断路器灭弧室的设计和优化

以拉法尔喷口结构为基础

对3种长度喷口结构下的冷态SF

气流场进行了数值计算和分析.通过对比压力与马赫数的变化特点

研究了上、下游压力以及喷口长短对气流场分布的影响.确定了3种长度喷口对应的临界压力比值

并着重分析了压力比与激波产生和运动之间的关系

讨论了物性参数所引起的计算误差.结果表明:不同长度的喷口结构

临界压力比不同

当上下游压力比低于临界值时

喷口中产生激波

反之则无激波产生; 激波的位置随着压力比以及喷口的长度而变化; 当喷口下游气体始终处于超音速流动时

出口压力与设定值无关

仅随着入口压力的增加而增大.此外

有效地导入气体属性能够降低数值仿真中的误差

提高仿真结果的精度.

Abstract

Cold SF

gas flow field is calculated and analyzed for three kinds of Laval nozzle structures to guide thermal gas flow field simulation in high voltage circuit breakers. The influences of different nozzle length

upstream and downstream pressures are investigated by comparing the variety characteristics of the pressure and the Mach number. The critical pressure values of the three nozzle structures are confirmed. The relationship between shock initiation and pressure ratio is analyzed

and the calculation error caused by available plasma properties data is discussed. The results show that different length nozzle structures are with different critical pressure values. The shocks appear when the pressure ratio is lower than the critical value

otherwise no shock arising. Shock position varies with the pre

ssure ratio and nozzle length. The outlet pressure is independent on the setting value and increases with the inlet pressure when the gas flow velocity gets always supersonic along in the nozzle downstream. The error in the simulation can be reduced with the effective implementation of the gas properties

which may improve the accuracy of the calculation results.

关键词

Keywords

references

KAIROUANI N, PERRIN B, ROBIN-JOUAN P, et al. On the use of Langmuir probes for the diagnosis of atmospheric thermal plasmas[J]. IEEE Transactions on Plasma Science, 2005, 33(4):1431-1442.[本刊相关文献链接]杜锦华, 梁得亮.波能直驱互感耦合式开关磁阻发电机的最佳效率跟踪控制.2012,46(4):52-57.隋宏亮,梁得亮,丁文.互感耦合开关磁阻电机的等效磁路模型与有限元分析.2010,44(4):71-75.王润新,刘进军.无须考虑电源接法和性质的三相电压型整流器平均模型.2009,43(12):81-85. 黎大健,杨景刚,梁基重,等.气体绝缘开关内自由运动金属颗粒的超声波信号特性.2009,43(2):101-105.杨景刚,黎大健,李军浩,等.气体绝缘开关直线和T型结构中电磁波传播特性的仿真.2008,42(12):1526-1530.李军浩,司文荣,杨景岗,等.直线及L型GIS模型电磁波传播特性研究.2008,42(10):1280-1284.刘芳.电流型单端初级电感变换器的不稳定性与分岔控制.2007,41(12):1465-1469.梁得亮,丁文,程竹平.基于Simplorer的三相开关磁阻起动/发电系统建模研究.2007,41(10):1210-1213.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

I/O Performance Modeling and Prediction Method for Large-Scale Parallel Applications Using Machine Learning

Study on the Thermodynamic Properties in the Anomalous Region of Supercritical Water

Effects of Expansion Angle Crater Film Hole on the Film Cooling Characteristics of a Double-Wall Structure

Energy Efficiency Optimization of the Cryogenic Air Separation Process for Electronic-Grade Ultra Pure Nitrogen

Research on the Electrohydrodynamic Effects of Ionic Liquid-Modified Fuels

Related Author

No data

Related Institution

No data

⁰

Influence of Pressure Ratios on Cold Gas Flow Field in HV SF6 Circuit Breaker Nozzles

DOI：

摘要

Abstract

关键词

Keywords

references

Influence of Pressure Ratios on Cold Gas Flow Field in HV SF₆ Circuit Breaker Nozzles