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Fine particles with a diameter of 2.5 microns or less (PM2.5) lead to dangerous air pollution, which can penetrate deep into the lungs and cause health damage by causing respiratory and cardiovascular diseases. PM2.5 appears mainly as a result of combustion processes such as car operations, burning coal, wood, fuel oil in CHP and in the private sector, as well as through industrial emissions and fires. High-efficiency particulate air (HEPA) filters effective used for capturing these harmful particles, but we have ...

The hypersonic technologies for the means of launching spacecraft into suborbital and near-earth orbits, as well as for unmanned systems, combining both shock qualities and intelligence functions working in very not favorable conditions. The impact of the ultrasonic beam on inertial navigation devices of launching spacecraft , in particular, in a multi-phase, in hypersonic conditions was not investigated. Excess heat that is released during the operation of integrating gyroscopes heats the air outside the housing....

This article presents a numerical study of the effects of changing the geometry of the turbine impeller blades on the efficiency and intensity of homogenization in a bioreactor. The mixing of liquid media is an important stage of technological processes in various industries. Modern Impellers are equipped with homogenizing devices for introducing energy into the liquid, they include hydraulic, pneumatic and mechanical devices or their combinations. Rational selection of the mixing device at the design stage is imp...