Research On The Emission Spectrum Of The Liquid-gas Mixture Discharge

In order to study the ray radiation in the liquid-gas mixture discharge , a set of discharging spectrum detection system and two sets of discharge system (Electrohydrodynamic (EHD) and bubbled water needle-plane electrode )were developed. The spectrums under the two discharge conditions are analysed. Finally, the line-line electrode EHD system is developed and its kinetics parameter is measured .EHD experiment results show that active species in discharge is mostly affected by gas constitute , while spraying only affected discharged shape. Active species such as nitrogen, oxygen, hydrogen atoms and ions will be produced in discharge , but no OH appears .In corona discharge , especially in the nitrogen-liquid mixture discharge ,the spectrum is clear. But in oxygen-liquid and air-liquid mixture discharge , because of the absorption of oxygen and ozone, the spectrum is not that clear. In sparkle discharge ,following conclusions could be reached: (1) overall spectral intensity in nitrogen is lower than in oxygen . When water is added, integrality light intensity is lower compared with the pure gas condition.(2) No matter it is nitrogen or oxygen, when water is added, syllabify three spectral lines of atomic H: Hα (656.3nm), Hβ(486.1nm), Hγ(434.0nm) could be seen. What is more, when water is added into oxygen, the spectral line of H atom becomes stronger.(3) When discharge in pure nitrogen, the light intensity falls with the increasing gas flow rate. While if water is added, the light intensity will rises with the increasing gas flow rate.(4) When discharging in pure oxygen, the light intensity rises with increasing gas flow rate. While if water is added, with increasing gas flow rate the light intensity initially will change as this:first rise, then saturate at about 140l/h, finally falls.The experimental results of pulse discharge of needle to plate electrodes in bubbled water show that: the active particles created by discharge is mainly decided by liquid phase(water),and the shape of discharge will change with gaseous components and the gas existence of gas. The active particles such as OH,O,H and so on are created by discharging. The research show that:(1)The spectral lines of OH(610nm),Hβ(486.07nm),Hγ(434.01nm),O+(544nm) can all be detected when oxygen, nitrogen and air is inleted respectively,but the spectral line of the oxygen is strongest(2)The intensity of spectrums increases with the flow of gas,and it will reach the maxmium value when the flow of gas is 120l/h.