Fig. 1. Schematic diagram of the mesh grid generation in nonparallel two-electrode gap典型非平行电极间的计算节点划分示意图

Fig. 2. Computational method of the in the gap of non-uniform pressure distribution 间隙压强不均布时的 计算方法

Fig. 3. The computational stability of DCP model as a function of N₀: (a) n₀ = 1; (b) n₀ = 10; (c) n₀ = 50; (d) n₀ = 100; (e) n₀ = 200; (f) n₀ = 500 (An example of case 1, gap pressure: 60 Pa, critical breakdown voltage: 345 V ) DCP计算结果稳定性随N₀的依变关系(a) n₀ = 1; (b) n₀ = 10; (c) n₀ = 50; (d) n₀ = 100; (e) n₀ = 200; (f) n₀ = 500 (case 1, 间隙压强60 Pa, 临界击穿电压345 V)

Fig. 4. The computational deviation of total ionization number in one path at different : (a) Potential path of No.1; (b) potential path of No.21 路径总电离次数的计算值随 变化的偏差　(a) No.1候选路径; (b) No.21候选路径

Fig. 5. A diagram of the test layout击穿试验系统布置

Fig. 6. VI-t curve of the discharge process in case 1 放电过程的VI-t曲线(数据来自case 1工况)

Fig. 7. The geometry and potential path generation in the laddered plate electrode (f = 3.97) 圆片阶梯电极的结构及候选路径划分(f = 3.97)

Fig. 8. The comparison of the calculation and test results in case 1 (working medium: Xe)Case 1试验与计算结果对比(气体工质: Xe)

Fig. 9. The relevant information of the MPDT: (a) Physical photograph; (b) the electrode geometry and potential path generationMPDT电极的相关信息　(a)实物照片; (b)电极结构及候选路径划分(f = 2.47)

Fig. 10. The comparison of the calculation and test results in case 2 (working medium: Ar)Case 2试验与计算结果对比(气体工质: Ar)

Fig. 11. The input conditions and calculation results in case 3 (working medium: Xe): (a) The electrode geometry and potential path generation; (b) the calculation results of the V-p curve and the critical path distribution Case 3的计算输入条件及计算结果(气体工质: Xe)　(a)电极结构及候选路径划分(f = 2.45); (b)V-p曲线的计算结果及起始路径分布

Fig. 12. The input conditions and calculation results in case 4(working medium: Xe): (a) The electrode geometry and potential path generation; (b) the calculation results of the V-p curve and the critical path distribution Case 4的计算输入条件及计算结果(气体工质: Xe)　(a)电极结构及候选路径划分(f = 3.76); (b)V-fr曲线的计算结果及起始路径分布

Fig. 13. The input conditions and calculation results in case 5 (working medium: Ar): (a) The electrode geometry and potential path generation; (b) the calculation results of the V-p curve and the critical path distribution Case 5的计算输入条件及计算结果(气体工质: Ar): (a) 电极结构及候选路径划分(f = 3.43); (b) V-p曲线的计算结果及起始路径分布

Fig. 14. The input conditions and calculation results in case 6(working medium: Xe): (a) The electrode geometry and potential path generation; (b) the calculation results of the V-p curve and the critical path distribution Case 6的计算输入条件及计算结果(气体工质: Xe)　(a)电极结构及候选路径划分(f = 2.84); (b)V-p曲线的计算结果及起始路径分布

Fig. 15. The formation reason of the entire V-p curve in the whole gap of case 3 整个电极的V-p曲线形成原因(case 3)

Fig. 16. The ionization collision number distribution at different gap pressures in case 3: (a) p = 40 Pa; (b) p = 80 Pa 不同压强下电极间隙的电离碰撞次数分布(case 3)　(a) p = 40 Pa; (b) p = 80 Pa

Fig. 17. The distribution of , and at different gap pressures and different potential paths in case 3: (a) The average , p = 40 Pa; (b) the average , p = 80 Pa; (c) the average , p = 40 Pa; (d) the average , p = 80 Pa; (e) the average , p = 40 Pa; (f) the average , p = 80 Pa , 和 在不同压强、不同候选路径上的分布规律(case 3)　(a)平均 , p = 40 Pa; (b)平均 , p = 80 Pa; (c)平均 , p = 40 Pa; (d)平均 , p = 80 Pa; (e)平均 , p = 40 Pa; (f)各节点的平均 , p = 80 Pa

Fig. 18. The excitation collision number distribution at different gap pressures in case 3: (a) p = 40 Pa; (b) p = 80 Pa 不同压强下电极间隙的激发碰撞次数分布(case 3)　(a) p = 40 Pa; b) p = 80 Pa