Detached Eddy Simulation and Validation on the Aerodynamic Train Model
2009 (English)In: EUROMECH COLLOQUIUM 509: Vehicle Aerodynamics, 2009Conference paper (Other academic)
We present CFD-simulations of the flow around the aerodynamic train model(ATM). The turbulence modelling technique is detached eddy-simulation(DES), where the DES model is based on the k-ω SST RANS model. TheReynolds number for the simulation is 60.000 based on the hydraulic diame-ter (3m in full scale), free-stream velocity and kinematic viscosity of air. Themodel used is in 1:50 scale. The numerical results are compared to water tunnelexperimental data on the ATM available from the German Aerospace Center(DLR). The velocity field is measured using particle image velocimetry (PIV).The numerical setup is made to match the experimental setup as close as possi-ble. Focus of the analysis is on the flow in the wake of the train. Comparisonsof the averaged velocity and the velocity fluctuations in the wake shows that theoverall levels and trends are captured by the numerical simulations. However,the peak value of the velocity magnitude in the wake seems to be overestimatedby the DES technique used.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-12745OAI: oai:DiVA.org:kth-12745DiVA: diva2:318533
QC 201005182010-05-182010-05-072012-03-21Bibliographically approved