Generation of aerosol nanoparticles by the multi-spark discharge generator

We have experimentally studied the formation of aerosol nanoparticles synthesized by the processes of electro-erosive wear of three pairs of electrodes upon a series connection on the discharge circuit that is controlled by a frequency generator of pulsed currents. Using a diffusion aerosol spectrometer, we have measured the particle-size distribution in the flows of aerosols upon varying velocity V of air flow, repetition frequency of discharge f, and single discharge energy W. It has been established that when controlling parameters of generator one can obtain nanoparticles (agglomerates of nanoparticles) in a wide range of mean size values dmean from 8 to 75 nm with a geometric standard deviation (GSD) of 1.3–2.0. The growth of agglomerates of nanoparticles monotonously depends on the residence time of particles in the gas and the particle concentration.