提出新型能量分离型喷口结构,在喷口上游引入X型导流片,以改变气流流路。为分析新型喷口对灭弧室内部电场分布的影响,采用有限元法,结合550 k V SF6断路器绝缘型式实验要求,对有无导流片结构的高压SF6断路器灭弧系统的绝缘特性进行数值...提出新型能量分离型喷口结构,在喷口上游引入X型导流片,以改变气流流路。为分析新型喷口对灭弧室内部电场分布的影响,采用有限元法,结合550 k V SF6断路器绝缘型式实验要求,对有无导流片结构的高压SF6断路器灭弧系统的绝缘特性进行数值计算与分析,得到在开断过程中导流片结构对断路器灭弧室内电场分布的影响。三维电场计算结果表明,有导流片结构的灭弧室内部最大电场强度值较无导流片结构有所降低,最大降低量为4.8%。展开更多
A two-level additive Schwarz preconditioner based on the overlapping domain decomposition approach is proposed for the local C0 discontinuous Galerkin (LCDG) method of Kirchhoff plates.Then with the help of an intergr...A two-level additive Schwarz preconditioner based on the overlapping domain decomposition approach is proposed for the local C0 discontinuous Galerkin (LCDG) method of Kirchhoff plates.Then with the help of an intergrid transfer operator and its error estimates,it is proved that the condition number is bounded by O(1 + (H4/δ4)),where H is the diameter of the subdomains and δ measures the overlap among subdomains.And for some special cases of small overlap,the estimate can be improved as O(1 + (H3/δ3)).At last,some numerical results are reported to demonstrate the high efficiency of the two-level additive Schwarz preconditioner.展开更多
文摘提出新型能量分离型喷口结构,在喷口上游引入X型导流片,以改变气流流路。为分析新型喷口对灭弧室内部电场分布的影响,采用有限元法,结合550 k V SF6断路器绝缘型式实验要求,对有无导流片结构的高压SF6断路器灭弧系统的绝缘特性进行数值计算与分析,得到在开断过程中导流片结构对断路器灭弧室内电场分布的影响。三维电场计算结果表明,有导流片结构的灭弧室内部最大电场强度值较无导流片结构有所降低,最大降低量为4.8%。
文摘A two-level additive Schwarz preconditioner based on the overlapping domain decomposition approach is proposed for the local C0 discontinuous Galerkin (LCDG) method of Kirchhoff plates.Then with the help of an intergrid transfer operator and its error estimates,it is proved that the condition number is bounded by O(1 + (H4/δ4)),where H is the diameter of the subdomains and δ measures the overlap among subdomains.And for some special cases of small overlap,the estimate can be improved as O(1 + (H3/δ3)).At last,some numerical results are reported to demonstrate the high efficiency of the two-level additive Schwarz preconditioner.
