Background. Improvement of the working processes efficiency of power and technological machinery and installations of vortex type. Objective. Statistical analysis of experimental test of the new methods of power-capacious coherent vortical structures control. Just their positive influence on processes of the transfer of mass, momentum and energy in swirling flows determines to a great extent the operating effectiveness of equipment. Methods. Spectral valuations data of represented in the present article, part 1, methods of artificial vortical disturbances influence on power-capacious coherent formation were subjected to the more detailed numerical processing on digital foundation. Results. Analysis of distributions of the composite swirling flow average actual velocities and the fluctuating movement intensity in characteristic area of the most power-capacious coherent vortical structure testifies to its definite stability and quasi-steady current. On the strength of this fact the detailed estimation of fluctuating movement energy balance according to determined characteristic frequency bands was carried out along the researching zone. The features of action of various eddy-generator types from the standpoint of control "stiffness" of the transfer processes were shown. Dispersion analysis confirmed the data of spectral processing of the information, put in part 1 of the article regarding to discovered phenomenon of "reverse decay of the vortices", that is the most typical for two-dimensional eddy-generator (EG № 1). Conclusions. Developed methods and their possible modifications offer the prospect of efficacious low-expended control on micro-level by hydromechanical, thermal and chemical processes in the cylinders of internal combustion engines, in vortex burners, combustion chambers of rocket engines, furnaces, plasmatrons, in mixers, chemical reactors, nuclear powerplants etc.

Background. Investigation of the limited flow structure and possibilities of its control in vortex chambers as elements of power units and manufacturing machinery for its working processes optimal setting. Objective. The quest of more perfect methods of control by energy carrying coherent vortical structures (ECVS) that have essential influence on processes of mass, momentum and energy transfer in swirling flows and therefore determine the efficiency of installation work. Methods. The frequency-spatial regions of ECVS, in which the correct statistical analysis of directed actions on its by artificial disturbing eddy formations is possible, are determined by means of visualization and hot-wire measuring of kinematic characteristics of wall current in the test vortex chamber. The disturbing eddy formations are generated in rectangular groove or in three hemispherical dimples of defined dimensions which are built directly in intake nozzle of chamber with adherence to necessary conditions of mutual susceptibility of vortical structures. Numerical processing of measured signals was carried out by fast Fourier transform algorithm. Results. Small by energy controlling actions to input flow cause substantial rise of power spectral density of velocity fluctuations on the most energy carrying frequenciesapproximately in 2-11.5 times depending on eddy-generator type and frequency band, including the "transfer" of energy density to the most large-scale eddy components of ECVS. This fact detects in ECVS all signs of typical open nonlinear dynamical system: existence of resonant modes with sharpening, when the energy feed from controlling vortices and its equiphase perception by Görtler-Ludwieg vortices take place not on full mode spectrum, but selectivity, only for certain harmonic components. Conclusions. It has been proved experimentally the possibility of effective and low-powered control by macroand microstructure of swirling flows. It opens the perspective of elaboration of new in principle methods for intensification of the transportable substances transfer in cylinders of internal-combustion engines, in vortex burners, combustors, chambers of rocket engines, furnaces, plasmatrons, mixers, chemical reactors, nuclear power plants etc.

Досліджено новий спосіб керування енерго-ємними когерентними вихровими структурами (ЕКВС), які визначають процеси масо-і тепло-переносу у вихрових камерах. Він полягає в раціо-нальній організації напрямлених керувальних дій на ЕКВС системою неперервних упорядкованих вихрових шнурів від мініатюрного крила мало-го видовження, яке встановлене у проточному тракті впускного сопла камери. Запропоновано теоретико-експериментальне обгрунтування досліджуваного способу на основі принципу вза-ємної сприйнятливості вихрових структур Ключові слова: когерентні вихрові структури, керування структурою течії, вихрова камера, криловий вихорогенератор, взаємна сприйнят-ливість вихорів Исследован новый способ управления энер-гоёмкими когерентными вихревыми структу-рами (ЭКВС), которые определяют процессы массо-и теплопереноса в вихревых камерах. Он состоит в рациональной организации направлен-ных управляющих воздействий на ЭКВС систе-мой непрерывных упорядоченных вихревых шну-ров от миниатюрного крыла малого удлинения, установленного в проточном тракте впускного сопла камеры. Предложено теоретико-экспери-ментальное обоснование исследуемого способа на основе принципа взаимной восприимчивости вих-ревых структур Ключевые слова: когерентные вихревые структуры, управление структурой течения, вихревая камера, крыльевой вихрегенератор, взаимная восприимчивость вихрей UDC 533.6.08: 532.527

We present the results of theoretical and experimental studies of flow processes of extended axisymmetric cavitators during motion near a free surface taking into account a considerable effect of fluid weightiness. The main objective of work is to study ways of reduction of fluid weightiness effect using lift at cavitator and other body (hull) elements within a cavity, in order to apply this way of drag reduction for a range of considerably lower motion speeds.

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