Effects of inlet geometry on turbine performance
(English)Manuscript (preprint) (Other academic)
In this study comparisons have been performed between gas-stand experiments,Unsteady Reynolds Averaged Navier-Stokes (URANS) simulations, and LargeEddy Simulations (LES) of the ow through a radial turbine of a turbochargerdesigned for an internal combustion engine. The long term goal for the projectis to improve the prediction capabilities for the simpler computational modelsused by industry in the research and development of new products. At thepresent stage the eects of using simplied geometries and methods for turbineperformance predictions are assessed. Additionally, data obtained from URANScalculations is compared against experimental data and against unsteady LESresults. The comparisons are made in order to evaluate the employed methodologies,to know when to use simplied models with reasonable accuracy, as wellas to justify the use of more advanced methods when the models are inadequate.It was found out that the LES results are closer to the gas-stand experimentsthan the URANS predictions are.
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-123084OAI: oai:DiVA.org:kth-123084DiVA: diva2:624481
QS 20132013-05-312013-05-312014-09-19Bibliographically approved