Surface Discharge in Atmospheric Pressure N2.pdf

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1、SimulationofSurfacedischargeinatmosphericpressureN2Breakdownvoltagevs.distancebetweenelectrodesModule：TTBEQPHM(fluidmodel)Copyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.71Computationalmodelunit：[mm]N21[atm],300[K]11d1CathodeAnode0.3εr=3.0hCopyright2002-2011PEGA

2、SUSSoftwareInc.,Allrightsreserved.72Boundaryconditions・Regardingelectricpotential[Cathode]φ=0[V][Anode]φ=V[V]（inputvalue）[Bottomsurfaceofainsulator]φ=0[V][Left,rightandtop]φ=0[V]at100[mm]farfromeachboundary・RegardingelectronfluxΓe・n=(1/4)vTne–γΓi・n+nisunitnormalvector、v

3、T=√(8eTe/πme)γ=0.05onthesurfaceoftheinsulatorandelectrodes+・RegardingionfluxΓi・n=(niμiE–Di▽ni)・n,ni=0onboundariesCopyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.73ComputationalResult(h=2mm)Breakdownvoltagevsdistancebetweenelectrode(h=2mm)放電開始電圧－電極間距離(h=2mm)4.03.

4、5]VK3.0[eg]2.5aVltko[2.0v圧ed電o1.5nA1.02mm0.50.00.01.02.03.04.05.06.0Distancebetweenelectrode[mm]電極間距離[mm]Copyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.74ComputationalResult(h=0.3mm)Breakdownvoltagevsdistancebetweenelectrode(h=0.3mm)放電開始電圧－電極間距離(h=0.3mm)1.6]1.4

5、VK[1.2ega]1.0ltVokv[0.8e圧d電o0.6nA0.40.3mm0.20.00.01.02.03.04.05.06.0Distancebetweenelectrode[mm]電極間距離[mm]Copyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.75Result（Dependencyofｈ）Breakdownvoltagevsdistancebetweenelectrode放電開始電圧－電極間距離14.0]12.0Paschen’slaw(air)■パッシェン

6、則（空気）VK[10.0e■遠方接地g]h2altVk8.0o[◆mish=2v圧h0.3e電6.0d▲Pash=0.3on4.0A2.00.00.01.02.03.04.05.06.0Distancebetweenelectrode[mm]電極間距離[mm]Copyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.76Densityprofileofelectron（h=0.3mm）e(-)density[/m3]e(-)density[/m3]d=1.0mmd=2.0mmd=3

7、.0mmV=1500VV=1500VV=1400Ve(-)density[/m3]e(-)density[/m3]d=4.0mmd=5.0mmV=1400VV=1500VCopyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.77Densityprofileofelectron（h=2mm）e(-)density[/m3]3e(-)density[/m3]e(-)density[/m]d=3.0mmd=1.0mmd=2.0mmV=3200VV=2100VV=3100Ve(-)de

8、nsity[/m3]e(-)density[/m3]d=4.0mmd=5.0mmV=3300VV=3500VCopyright2002-2011PEGASUSSoftwareInc.,Allrightsreserved.