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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Dynamics and density estimation of hydroxyl radicals in a pulsed corona discharge
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Dynamics and density estimation of hydroxyl radicals in a pulsed corona discharge

机译:脉冲电晕放电中羟基自由基的动力学和密度估计

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Hydroxyl radicals generated by a pulsed corona discharge are measured by laser-induced fluorescence (LIF) with a tunable KrF excimer laser. The discharge with 35 kV voltage and 100 ns pulse current occurs between needle and plate electrodes in H2O/O-2/N-2 mixture at atmospheric pressure. The density and decay profile of OH radicals are studied. OH radicals decay with time after the discharge with a time constant of about 30-60 mus. The OH density is estimated to be about 7 x 10(14) cm(-3) in H2O(2.4%)/N-2 mixture 10 mus after the discharge. The OH density is approximately proportional to the energy dissipated in the discharge. The O-2 content influences the OH production. When the O-2 content is varied in H2O(2.4%)/O-2/N-2 mixture, the OH density is maximum at an O-2 content of 2%. The spatial distribution of OH density shows that OH radicals are produced in the streamers under positive discharge. [References: 17]
机译:由脉冲电晕放电产生的羟基自由基是通过可调谐KrF准分子激光器通过激光诱导的荧光(LIF)进行测量的。在大气压下,H2O / O-2 / N-2混合物中的针状电极和板状电极之间会发生35 kV电压和100 ns脉冲电流的放电。研究了OH自由基的密度和衰减曲线。 OH自由基在放电后随时间衰减,其时间常数约为30-60亩。放电后10毫秒,在H2O(2.4%)/ N-2混合物中,OH密度估计约为7 x 10(14)cm(-3)。 OH密度大约与放电中消耗的能量成正比。 O-2含量会影响OH的产生。当O-2含量在H2O(2.4%)/ O-2 / N-2混合物中变化时,OH密度在O-2含量为2%时最大。 OH密度的空间分布表明在正放电下在拖缆中产生OH自由基。 [参考:17]

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