ЕКСПЕРИМЕНТАЛЬНЕ ДОСЛІДЖЕННЯ ВИХРОВИХ ПОВІТРЯНИХ ПОТОКІВ

M. O. Klуmenko; O. M. Kukhniuk

Authors

M. O. Klуmenko National University of Water and Environmental Engineering
O. M. Kukhniuk National University of Water and Environmental Engineering

Keywords:

experiment, classification, vortex flows, tornado

Abstract

Vortical (or twisted) streams are extremely widespread in nature(atmospheric cyclones, sandstorms, air storms, typhoons, forestfires).Modern laboratory studies simulating natural tornadoes can bedivided into two categories: walls limited by stationary air vortices, which are formed as a result of the use of fans, mechanical twisters (guides designed to create vortex streams, screw screws, internal spiral arms, etc.), as well as through the tangential nozzle of the medium and the intensive rotation of the body elements (pipes) [2-11]. The purpose of these studies was to obtain the most stationary tornadoes. Such experimental installation allowed to simulate different types of vortex flows due to a wide range of variable output parameters (tangential velocity, air flow).Another principle is the creation of nonstationary vortical flows. Inthis case, after controlling the surface heating, nonstationary vortexstructures (minitorno) were generated, due to the creation of unstable stratification of air. For visualization, trace particles were used (magnesia of micrometer size applied by a thin layer on theunderlying surface).The experimental work described was devoted only to obtaining orstationary vortex structures with the use of mechanical twisters(which, in this formulation of the task, a number of fundamentalissues of studying the tornado remained out of focus), or freeconcentrated non-stationary vortical structures (which, in turn,complicates studying as a result of the spontaneity of occurrence,spatial-temporal instability, etc.).The proposed installation rests on previous experiments and in turnallows us to study a number of fundamental characteristics of thevortex structures (change in temperature, humidity, pressure in theheight of vortex flows, their change over time, air mass velocities, and the distribution of these parameters in the body of the tornado).The appropriate sensors are located in the middle of the installationwith a change in the height of the body of the installation. In addition to improving the mathematical models of complex airborne processes in the body of the tornado, based on the previous studies, we expect a certain temperature difference in the vortex body, so this installation can be a prototype of cooling installations in various industries.

Author Biographies

M. O. Klуmenko, National University of Water and Environmental Engineering

Doctor of Agricultural Sciences, Professor

O. M. Kukhniuk, National University of Water and Environmental Engineering

Candidate of Engineering (Ph.D.), Associate Professor

References

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