NDLI: LES and RANS Investigations Into Buoyancy-Affected Convection in a Rotating Cavity With a Central Axial Throughflow

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sun, Zixiang Lindblad, Klas John, W. Chew Young, Colin
Copyright Year	2006
Abstract	The buoyancy-affected flow in rotating disc cavities, such as occurs in compressor disc stacks, is known to be complex and difficult to predict. In the present work large eddy simulation (LES) and unsteady Reynolds-averaged Navier-Stokes (RANS) solutions are compared with other workers’ measurements from an engine representative test rig. The Smagorinsky-Lilly model was employed in the LES simulations, and the RNG k-ε turbulence model was used in the RANS modelling. Three test cases were investigated in a range of Grashof number Gr = 1.87 to 7.41×108 and buoyancy number Bo = 1.65 to 11.5. Consistent with experimental observation, strong unsteadiness was clearly observed in the results of both models, however the LES results exhibited a finer flow structure than the RANS solution. The LES model also achieved significantly better agreement with velocity and heat transfer measurements than the RANS model. Also, temperature contours obtained from the LES results have a finer structure than the tangential velocity contours. Based on the results obtained in this work, further application of LES to flows of industrial complexity is recommended.
Sponsorship	International Gas Turbine Institute
Starting Page	1355
Ending Page	1364
Page Count	10
File Format	PDF
ISBN	079184238X
DOI	10.1115/GT2006-90251
e-ISBN	0791837742
Volume Number	Volume 3: Heat Transfer, Parts A and B
Conference Proceedings	ASME Turbo Expo 2006: Power for Land, Sea, and Air
Language	English
Publisher Date	2006-05-08
Publisher Place	Barcelona, Spain
Access Restriction	Subscribed
Subject Keyword	Temperature Turbulence Rotating disks Buoyancy Compressors Flow (dynamics) Modeling Convection Engines Cavities Large eddy simulation Simulation Reynolds-averaged navier–stokes equations Disks Engineering simulation Heat transfer
Content Type	Text
Resource Type	Article

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