EFFICIENCY OF VORTICAL AND JET CONTROL OF CURRENT STRUCTURE IN LIMITED SWIRLING FLOWS
Background. Low-cost control by energy-carrying coherent vortex structures (CVS), determining transfer processes of mass, momentum and energy in vortex mixing chambers (VC) to increase working processes efficiency in vortex technological and power apparatuses.
Objective. The purpose of the paper is to investigate the response of the CVS at the outlet of the VC on directional control actions according to two methods of influence on the CVS based on mutual susceptibility principle of vortex structures: 1 – by means of the end vortex cords from the wing eddy-generator in the inlet nozzle of the VC; 2 – with the help of turbulent jets with different orientation relative to the CVS in the deadlock part of the VC from the side of its end. The aim is to compare the results of the implementation of such control actions by analyzing the profiles of the average velocity and the relative intensity of flow velocity fluctuations at the outlet of the VC.
Methods. Experimental study of the formation and interaction of control vortices and CVS in the chamber cavity in combination with the rated estimates.
Results. An increase of the relative intensity of flow velocity fluctuations in the outlet zone of the VC by individual components is shown: from 22% to 63% in the first (vortex) method of control of the CVS and from 6% to 38% in the second (jet) control method. Thus, the effectiveness of applying the principle of mutual susceptibility of control and driving vortex structures in limited swirling flows, which is the basis of the control methods realization, is proved.
Conclusions. The possibility of efficient and low-cost control by energy-carrying CVS, which determines mass and heat transfer processes in vortex mixing chambers, is experimentally proved. Operability, features and advantages of vortex and jet control methods are shown.
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H. Schlichting, “Theory of boundary layer”,Moscow, Nauka, 1974, 712 p. (in Russian).
V.N. Turick, “On hydrodynamic instability of flows in vortex chambers”, Promyslova gidravlika i pnevmatyka, no. 3(13), pp. 32–37, 2006 (in Russian).
A. Hupta et al., “Swirl flows”,Moscow, Mir, 1987, 588 p. (in Russian).
A.A. Khalatov et al., “Heat transfer and fluid flow in the fields of centrifugal forces”, vol. 3: “Swirl flows”,Kiev, Institute of Engineering Thermophysics of National Academy of Sciences ofUkraine, 2000, 474 p. (in Russian).
Ye.V. Mochalin and A.A. Khalatov, “Heat transfer and fluid flow in the fields of centrifugal forces”, vol. 8: “Hydrodynamics of Swirl flow in Rotary Filters”,Kiev, Institute of Engineering Thermophysics of National Academy of Sciences ofUkraine, 2010, 428 p. (in Russian).
R.A. Makarenko and V.N. Turick, “Kinematics of flow in a dead end part of a vortex chamber”, International Journal of Fluid Mechanics Research, vol. 31, no. 3, pp. 299–306, 2004 (in English).
V.V. Babenko and V.N. Turick, “Breadboard model of flow in the vortex chamber”, Applied Hydromechanics, vol. 10 (82), no. 3, pp. 3–19, 2008 (in Russian).
V.N. Turick, V.O. Kochin and M.V. Kochina, “Evaluation of the Efficiency of Coherent Vortex Structures Control in the Mixing Chamber by Means of Wing Eddy-generators”, Naukovi Visti NTUU “Igor Sikorsky Kyiv Polytechnic Institute”, no. 4, pp. 70–84, 2018 (in Ukrainian).
V. Turick, V. Kochin and M. Kochina, “Ixamining the Technique to Control the Structure of Current in Vortex Chambers by Wing Vortex Generators”, Eastern-European Journal of Enterprise Technologies (Applied physics), vol. 1, no. 5 (91), pp. 28–38, 2018 (in English).
M.S. Selig et al., “Airfoils at Low Speeds”,North Horseshoe Circle,Virginia Beach,USA, 1989, 398 p.
M.S. Selig et al., “Summary of Low-Speed Airfoil Data”, vol. 1, SoarTech Publications, Virginia Beach, Virginia, USA, 1995, 292 p.
V.O. Kochin, V.N. Turick and M.V. Kochina, “Features of the choice and operation conditions of wing eddy-generator in inlet nozzle of vortex chamber”, Progressive technics, technology and education, XVII International scientific and technical conference (21–24 June, 2016), Kyiv-Odessa, 2016, pp. 144–146. (in Ukrainian).
V. Babenko and V. Turick, “Coherent Vortical Structures Control in Flat and Curvilinear Parietal Flows”, Proc. of the World Congress “Aviation in the 21-st Century” (14–16 Sept., 2003), Kyiv: NAU, 2003, pp. 2.54–2.58 (in English)
V.N. Turick, V.V. Babenko and D.Ye. Miliukov, “About Dynamic Method of Flow Structure Control in Vortex Chamber”, “Eastern-European Journal of Enterprise Technologies”, vol. 5, no.7 (59), pp. 52–59, 2012 (in Russian).
V. Turick and D. Miliukov, “Analysis of Flow Structure in the Vortex Chamber with End Jet Control”, Naukovi Visti NTUU “KPI”, no.2 (94), pp. 76–87, 2014 (in Ukrainian).
V. Turick and D. Miliukov, “The Outlet Flow Structure of Vortex Chamber with Dead End Jet Actions”, “Eastern-European Journal of Enterprise Technologies”, vol. 3, no.8 (69), pp. 45–51, 2014 (in Russian).
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