Conditions for Propagation of Air Inflammation in the Reactor with Reflecting Walls

This Article is concerning to investigation of Electronic Energy Explosion (EEE) in Air properties. The Phenomenon of EEE is described by exponential growth of electronically excited molecules concentration initiated by pulse periodic discharge with frequency 1000 Hz or by pulse of discharge near the surface of ferrite piece [1,2]. In the recent work [3] was found, that enhancing of Air pressure higher then Р = 1,3 atm at the initiation of EEE results in formation of active zone which propagates from the initiation region to whole the reactor volume. So, at air pressures lower then 1,3 atm the propagation of air inflammation is not observed, and at air pressures Р> 1,3 atm-it can be observed. As the ability of flame to propagate is rising with the reaction rate rising, we can explain the effect of air pressure by participation of air molecules in the chain branching and termination processes of a nitrogen oxidation chain reaction. The Mechanism of nitrogen oxidation chain reaction [4] includes the reaction of electronically excited molecules NO2* formation: NO + O +M => NO2* + M. This gives for the stationary concentration of NO2* [4]:


Introduction
This Article is concerning to investigation of Electronic Energy Explosion (EEE) in Air properties. The Phenomenon of EEE is described by exponential growth of electronically excited molecules concentration initiated by pulse periodic discharge with frequency 1000 Hz or by pulse of discharge near the surface of ferrite piece [1,2]. In the recent work [3] was found, that enhancing of Air pressure higher then Р = 1,3 atm at the initiation of EEE results in formation of active zone which propagates from the initiation region to whole the reactor volume. So, at air pressures lower then 1,3 atm the propagation of air inflammation is not observed, and at air pressures Р> 1,3 atm-it can be observed. As the ability of flame to propagate is rising with the reaction rate rising, we can explain the effect of air pressure by participation of air molecules in the chain branching and termination processes of a nitrogen oxidation chain reaction. The Mechanism of nitrogen oxidation chain reaction [4] To explain the rising of electronically excited molecules concentration and the chain branching rate together with [M] it is necessary that the termination of such molecules does not depend on [M]. It is possible at high concentration of NO 3 or (and) at high intensity of stimulated emission of radiation. The stimulated emission makes the main contribution to the radiation process in the EEE active medium [5,6]. So, we can assume that covering of reactor walls with some reflective material (the Al foil for example) can significantly better the conditions of air inflammation propagation after initiation of EEE by using of electric discharge near the surface of ferrite piece. The Aim of this work was the experimental proof of the assumption mentioned above.

Results of Experiments
One frame of the video containing the image of EEE in the transparent plastic tube without Al foil is placed on the Figure 1.
There can be seen that the active luminescent zone is located close to the initiation region. On the Figure 2 is placed a frame of video which contains the EEE image in the tube wrap up with Al foil. In this case the EEE active zone filled the entire volume of the tube.
Thus, one can state that the inflammation of air propagates in the tube with reflecting walls at the atmospheric pressure.

Discussion
The obtained results give evidence that radiation of electronically excited molecules makes the main contribution to their deactivation. It is possible only in the case when the stimulated (not spontaneous) emission of radiation takes place.
In the analogical experiment with EEE in the jerrican of 10 liter volume wrap up with Al foil at the air pressure 1.5 atm (Figure 3) was observed the red radiation coming through the slit in the foil to the white screen in the same time when the yellow radiation passes through the butt-ends of the jerrican (this radiation can contain the green and blue components). The red radiation can be attributed to NO 2 * molecules, the green colored radiation comes from exiplexes  That is two orders of magnitude more than average thermal energy of molecules at room temperature. The air inflammation propagation gives the method for nitrogen oxidation in the unrestricted volumes by spending restricted amounts of energy. Using of reflecting walls of the reactor is simpler technologically then creation of hermetic reactor for the pressures as high as 1.5 atm.