磁场环境下针板DBD臭氧发生的参数影响

Multi-parameter Effects on Ozone Generation in Needle-plate DBD with Magnetic Field

磁场能有效地改变介质阻挡放电放电特性。然而,目前对于磁场环境下DBD臭氧发生重要参数的影响鲜有报道。本文主要实验研究了放电电压、频率和气体流量对磁场环境下针板DBD臭氧发生的影响。实验结果表明:磁场增加了放电电流,因此在8 kV和6.5 kHz下放电功率提高了约22.9%;臭氧浓度、臭氧产率和放电功率均随放电电压的增加而增加。同时磁场对臭氧浓度和放电功率有积极的影响,且随着放电电压的增大,这种影响将更明显。在8 kV,6.5 kHz和1 SLPM下臭氧浓度增加约33.1%,但磁场并不能增加臭氧产率;臭氧产率则随着气体流量的增大而逐渐增大;随着放电频率的增加,臭氧浓度和放电功率增加。同时随着放电频率的增加,磁场对臭氧浓度和放电功率将有更积极的影响。

The dielectric barrier discharge characteristics can be effectively changed by magnetic field.However,there are few reports about parameter effects on ozone generation in DBD with magnetic field.The effects of discharge voltage,frequency and airflow rate on ozone generation in needle-plate DBD with magnetic field were investigated in this work.The addition of magnetic field can increase discharge current.An approximately 22.9%higher discharge power can be obtained at 8 kV and 6.5 kHz;The ozone concentration,yield and discharge power all increase with the increase of discharge voltage.Meanwhile,the magnetic field affected ozone concentration and discharge power positively,and the effect will be more obvious with higher discharge voltage.The ozone concentration can be increased by 33.1%at 8 kV,6.5 kHz and 1 SLPM.However,the magnetic field does not substantially increase the ozone yield;The ozone yield increases with higher airflow rate;The ozone concentration and discharge power increase with higher discharge frequency.Meanwhile,the magnetic field will have a more positive impact on ozone concentration and discharge power with higher discharge frequency.