Open AccessNumerical research of the influence of the geometric parameters of shadowing fins on the intensity of jet cooling by supercritical carbon dioxide
Author(s) -
Andrey Rogalev,
Vladimir Kindra,
Sergey Osipov,
Bulat Makhmutov,
Alexey Zonov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1683/2/022050
Subject(s) - body orifice , nusselt number , mechanics , heat transfer , fin , materials science , jet (fluid) , intensity (physics) , hydraulic diameter , supercritical fluid , mechanical engineering , thermodynamics , composite material , physics , engineering , turbulence , optics , reynolds number
This paper discloses computer simulation results of thermos-hydraulic processes in cooling channels of carbon dioxide turbines used in oxy-fuel power production facilities. Stream cooling systems may be modified by the installation of shadowing ribs on the pressure and suction sides of a hollow blade and this intensifies heat transfer and reduces the cooling agent flow. The heat transfer maximal intensity is obtained at the distance between deflector orifice and shadowing fin of 0.25 orifice diameter. Change of the shadowing fin cross-section shape from oval to circular causes increases of the channel hydraulic resistance for 20–28% and the mean Nusselt number for 8–25%.