摘要
The negative DC corona discharge in air at atmospheric pressure was investigated in a needle-to-water system to obtain the pressure distribution of corona ionic wind.The deformation of water surface was measured and the distribution of wind pressure over the water surface was calculated.The effects of varying discharge parameters,such as applied voltage,gap spacing,tip radius of needle,and the shape of grounded electrode,on the wind pressure were studied.The measured wind pressure ranges from several Pa to several tens of Pa and up to 33 Pa over a small area;the pressure is comparatively large in the center and decreases quickly outwards.In the experiment system,a higher voltage on a 3 mm gap resulted in a stronger pressure of the ionic wind;around the onset voltage,using a needle with tip radius of 50μm obtained a larger wind pressure than using a needle with 100μm tip radius,but the latter one can produce larger pressure at higher voltages.Plus,the shape of the grounded electrode only influences the wind pressure a little.
The negative DC corona discharge in air at atmospheric pressure was investigated in a need/e-to-water system to obtain the pres- sure distribution of corona ionic wind. The deformation of water surface was measured and the distribution of wind pressure over the water surface was calculated. The effects of varying discharge parameters, such as applied voltage, gap spacing, tip radius of needle, and the shape of grounded electrode, on the wind pressure were studied. The measured wind pressure ranges from several Pa to several tens of Pa and up to 33 Pa over a small area; the pressure is comparatively large in the center and decreases quickly outwards. In the experiment system, a higher voltage on a 3 mrn gap resulted in a stronger pressure of the ionic wind; around the onset voltage, using a needle with tip radius of 50 pm obtained a larger wind pressure than using a needle with 100μm tip radius, but the latter one can produce larger pressure at higher vol- tages. Plus, the shape of the grounded electrode only influences the wind pressure a little.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第9期2187-2192,共6页
High Voltage Engineering
基金
Project supported by National Key Laboratory of Science and Technology on Electro-mechanical Dynamic Control of China(2011C3606)
关键词
压力分布
电晕放电
离子风
水针
起始电压
接地电极
风压力
大气压力
corona discharge
needle-to-water electrode
ionic wind
pressure distribution
electric field
current density