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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Computational fluid dynamics studies of developing turbulent flows with various entrance geometries
In order to investigate the effect of entrance geometry conditions on pressure loss characteristics of a turbulent flow in straight flat oval ducts, numerical analysis was performed by solving the Reynolds-averaged Navier-Stokes equations. The turbulent flow in a 356 mm × 152 mm (14 in. × 6 in.) flat oval straight duct section was modeled for a range of Reynolds numbers using the commercial computational fluid dynamics software Fluent-6.3. The computational fluid dynamics model was validated by comparing the numerical results with published experimental data. Simulations were conducted for eight different entrance geometries. The results showed that the entrance ductwork affected the pressure loss inside the flat oval straight ducts. It was recommended that the minimum entrance length for ASHRAE Standard 120-2008 be increased from 10 hydraulic diameters to 15 hydraulic diameters to ensure fully developed flow regardless of entrance geometry conditions to the straight test section.
Computational fluid dynamics studies of developing turbulent flows with various entrance geometries
In order to investigate the effect of entrance geometry conditions on pressure loss characteristics of a turbulent flow in straight flat oval ducts, numerical analysis was performed by solving the Reynolds-averaged Navier-Stokes equations. The turbulent flow in a 356 mm × 152 mm (14 in. × 6 in.) flat oval straight duct section was modeled for a range of Reynolds numbers using the commercial computational fluid dynamics software Fluent-6.3. The computational fluid dynamics model was validated by comparing the numerical results with published experimental data. Simulations were conducted for eight different entrance geometries. The results showed that the entrance ductwork affected the pressure loss inside the flat oval straight ducts. It was recommended that the minimum entrance length for ASHRAE Standard 120-2008 be increased from 10 hydraulic diameters to 15 hydraulic diameters to ensure fully developed flow regardless of entrance geometry conditions to the straight test section.
Computational fluid dynamics studies of developing turbulent flows with various entrance geometries
Kulkarni, Devendra (Autor:in) / Cui, Jie (Autor:in) / Idem, Stephen (Autor:in)
HVAC&R Research ; 19 ; 38-52
01.01.2013
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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