INFLUENCE OF HEIGHT OF ARTIFICIAL ROUGHNESS ELEMENTS ON FLOW IN DIFFUSER CHANNEL
Journal Title: Проблеми тертя та зношування - Year 2017, Vol 76, Issue
Abstract
In the work a series of calculations of flow in diffusers at an opening angle 20°...32° was carried out. With an increase in the opening angle in smooth diffusers the flow separation with the several vortices is observed. The paper presents the results of the study on the effect of the change in the height of the elements of artificial roughness on the losses level in the diffuser channel. The elements of artificial roughness were located in the entrance area of the diffuser. The height of the roughness elements varied from 0.5 mm to 0.2 mm. The results of the research have shown that the installation of artificial roughness influences the flow parameters in the diffuser channel. The use of elements of artificial roughness, the height of which gradually increases, leads to a decrease in the level of hydraulic losses in the diffuser channel.
Authors and Affiliations
YU. YU. TERESHCHENKO
Keywords
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