Aerodynamics of vortex flows of dry agent in dry camera
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2018, Vol 81, Issue 1
Abstract
The authors of the paper investigate hydraulic characteristics of vortex flows in the drying chamber of the original design, which is used to obtain finely dispersed paste materials. For the construction of 3-dimensional figures with moving elements and calculations of the vortex flow parameters of the drying agent, an automated system for designing and calculating SolidWorks Simulation was used. The analysis of vortex flow, velocity fields and pressure drop of the drying agent was carried out. As a result of this work, aerodynamic characteristics of vortex flows of a drying agent were obtained, in the analysis of which it is possible to improve the process of drying of paste-like materials and to develop the most effective design of vortex type drying machines. Directions of vortex flows of a drying agent with different initial costs (0,033 m3/s and 0,028 m3/s) were analyzed and two components of velocities were obtained: axial and tangential. The axial speed is centered in the drying chamber, which transports the fine particles of the material from the grinding zone to the drying zone and removes it from the chamber. The tangential velocity of the gas phase is concentrated along the periphery of the drying chamber, which separates the particles of the material and increases the heat transfer efficiency between the particles and the coolant due to the turbulization of the two-phase flow and the increase of the Re number. The tangential velocity of the vortex flow decreases as a result of decreasing the radius of the drying chamber. The swirling coefficient of vortex flows is determined, which is 5,5 ... 7,0. The pressure distribution fields are analyzed in terms of the volume of the original drying chamber and the overall pressure difference is determined. Due to the given shape of the chamber and the swirling of the vortex flows to the drying agent, the pressure decreases from the maximum value in the upper chamber to the minimum in the lower part, due to which the wet agglomerates on the cone-shaped walls return to the dispersion zone.
Authors and Affiliations
V. M. Marchevsky, Y. V. Grobovenko
Keywords
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