FORMATION OF THE SECONDARY VORTICES IN AN ANNULAR CHANNEL WITH IMMOVABLE SURFACES IN THE CASE OF SWIRLING OF FLUID FLOW IN IT

The appearance of the secondary vortices in an annular channel, formed by two immovable coaxial cylinders, in the case of initial swirling of a fl uid fl ow in it, was considered. The fl uid fl ow was swirled with the use of an axial-vane swirler with 22 aerodynamic vanes equipped with an indexing mechanism regulating the angle of swirl of the fl uid fl ow. The aerodynamic characteristics of this fl ow were measured by the method of Doppler laser anemometry. The calculations were performed using a numerical model, based on the fi nite volume method, which was verifi ed with the use of experimental data. The formation of the secondary vortices in a swirling fl ow in the indicated channel was visualized, and the main parameters of these vortices were determined. Prospects for the use of the secondary fl ows arising as a result of the swirling of a fl uid fl ow in an annular channel for the intensifi cation of heat exchange in it are shown.
The appearance of the secondary vortices in an annular channel, formed by two immovable coaxial cylinders, in the case of initial swirling of a fl uid fl ow in it, was considered. The fl uid fl ow was swirled with the use of an axial-vane swirler with 22 aerodynamic vanes equipped with an indexing mechanism regulating the angle of swirl of the fl uid fl ow. The aerodynamic characteristics of this fl ow were measured by the method of Doppler laser anemometry. The calculations were performed using a numerical model, based on the fi nite volume method, which was verifi ed with the use of experimental data. The formation of the secondary vortices in a swirling fl ow in the indicated channel was visualized, and the main parameters of these vortices were determined. Prospects for the use of the secondary fl ows arising as a result of the swirling of a fl uid fl ow in an annular channel for the intensifi cation of heat exchange in it are shown.
Author:  E. V. Pankratov
Keywords:  intensifi cation of heat exchange, annular channels, secondary fl ows, Couette–Taylor fl ow, swirling fl ow, experimental investigation, numerical simulation
Page:  240