Response of the Structure and Characteristics of the Outlet Flow of a Vortex Mixing Chamber to Changes in Design Parameters. Part 1

Authors

DOI:

https://doi.org/10.20535/2521-1943.2025.9.3(106).337142

Keywords:

vortex chamber, coherent vortex structures, mixing of components, heat and mass transfer, power plants, rocket engine, thermal anemometry, velocity profiles, pulsation intensity

Abstract

The results of an experimental study of the little-studied phenomenon of the influence of vortex formations of the dead end part of a vortex mixing chamber of the end type on the structure and integral characteristics of the output flow are presented. Thermoanemometric studies on a model sample of a vortex chamber of a typical design made it possible to identify the reaction of the profiles of the components of the time-averaged local velocity and the relative intensity of the flow velocity pulsations, which determine the efficiency of mixing and heat and mass transfer, to the complex variation of the axial angles a of the tangential supply of the medium to the chamber cavity and the relative depth of its dead end part L* = L/d0 (d0 is the diameter of the chamber). Zones of localization of almost isotropic turbulence with uniform mixing of the working medium in coherent vortex formations were identified. It was found that at a = +20° the increase in the value of L* from 0 to 4.4 is accompanied by a more regular in terms of Re number character, compared to the chamber variant with a = –20°, of the redistribution of the kinetic energy of the swirling flow from the rotational to the axial components of the motion with a simultaneous increase of 15–17 % in the intensity of transverse pulsations in the studied range of Reynolds numbers
Re = 47080÷86530. Under these conditions two-dimensional pulsation intensity averaged over the output cross section for the chamber with a = +20° increases from 13 % to 17 % against (3–9) % increase for the variant a = –20°. Therefore, the combination of chamber parameters a = +20° and L* = 4.4 can be considered as one of the simplest constructive and effective control actions on the transfer processes in swirling flows of working media, which is important in the design of combustion chambers, rocket engines, power plants, chemical reactors, etc.

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Published

2025-09-26

How to Cite

[1]
V. Turyk, V. Kochin, and V. Moroz, “Response of the Structure and Characteristics of the Outlet Flow of a Vortex Mixing Chamber to Changes in Design Parameters. Part 1”, Mech. Adv. Technol., vol. 9, no. 3(106), pp. 259–270, Sep. 2025.

Issue

Vol. 9 No. 3(106) (2025)

Section

Mechanics

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Copyright (c) 2025 Володимир Турик, Віктор Кочін, Володимир Мороз

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