Optical methods of hydrodynamic cavitation validation: correlation with hydrodynamic parameters
Anna A. Pronchenko 1, M.A. Zavyalova 1,2, Eduard V. Arbuzov 1,3, Igor F. Sekiro 3, Aleksandr A. Drannikov 1,4,5, Igor I. Korel 1; 1. Novosibirsk State Technical University, Novosibirsk, Russia; 2 Design and Technological Institute of Scientific Instrumentation SB RAS, Novosibirsk, Russia; 3 S.S. Kutateladze Institute of Thermophysics
Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia; 4. Novosibirsk State University, Novosibirsk, Russia; 5. N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
Abstract
Herein we presented a set of diagnostic methods for quantifying the effectiveness of hydrodynamic cavitation in a non-reactive water treatment module, including high-speed video recording and laser-induced fluorescence (LIF), providing non-intrusive monitoring of the process in real time. Digital image processing of the cavitation zone allowed us to establish statistical distributions of cavitation bubbles by size, resulting in a characteristic diameter about 100 microns, and frequency of occurrence and to determine optimal hydrodynamic parameters (cavitation number and diameter of the outlet holes of the vortex chambers), ensuring a stable cavitation regime. The validation of proposed approach on real borehole water confirmed its effectiveness: iron concentrations were reduced to less than 0.10 mg/L, and manganese concentrations to less than 0.01 mg/L. The developed technique can afford a controlled optimization of the operating modes of the cavitation unit for reagent-free water purification.
Speaker
Anna A. Pronchenko
Novosibirsk State Technical University, Novosibirsk, Russia
Russia
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