POSSIBILITIES OF INCREASING THE EFFICIENCY OF PYROTECHNICAL GENERATORS OF ICE-FORMING AEROSOL

Introduction. The currently achieved eficiency of pyrotechnic generators of ice-forming aerosol, calculated on pure silver iodide, is 1E+14 active particles at a temperature of minus 10 °C. Meanwhile, since there is currently data on the activity of silver iodide particles with a size of 50 nm at this temperature and below, and given that approximately 1E+19 particles of this size can be obtained from 1 g of silver iodide, there is reason to assume a signiicant increase in the efficiency of existing pyrotechnic compositions. In this work, the ways of increasing the efficiency of existing pyrotechnic generators and means of active influence are investigated. Materials and methods of the research. Laboratory experiments were carried out on the physical modeling of the combustion processes of pyrotechnic compositions under the inluence of various conditions. The spectra of the combustion products of pyrotechnic compositions obtained in the study of the operating modes of the generators and the variants of the generator design were analyzed. The results of the study and their discussion. The factors influencing the change in the combustion spectra of the pyrocompositions of the generators of ice-forming aerosol are analyzed. It is shown that the blowing speed significantly changes the aerosol spectrum; an increase in the number of nozzle openings and the organization of the drift mixing mode of gas jets lead to an increase in the yield of active particles in the size range of 50-70 nm; an increase in the operating pressure at which the generator operates leads to an increase in the percentage of silver iodide that has passed into the vapor phase without decomposition by about two times. Conclusions. The results of experiments on increasing the yield of active ice-forming particles during the operation of pyrotechnic generators under the inluence of the following factors are presented: change in the blowing speed of the pyrotechnic generator; changing the geometry of the jets formed during the combustion of the generator; changing the direction of blowing the torch; change in the content of silver iodide in combustion products.

Ice-forming aerosol, ice-forming reagents, active influences, anti-hail agents

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