BI-STABLE STATES IN THE WAKE OF A SIMPLIFIED GROUND TRANSPORTATION SYSTEM (GTS) MODEL
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2017

Recent experimental investigations of [1] in the wake of a Ground Transportation System (GTS) model has shown that the near wake topology is invariant over a large range of Reynolds numbers. A large eddy simulation (LES) is thus undertaken to investigate the flow topology in the near wake. In the vertical midplane behind the model, a flow state which is anti-symmetric to that reported in [1] is observed here, confirming the possibility of occurrence of bi-stable flow. Interestingly, the flow topology remains invariant to any increase in the gap height from the standard case, indicating that the underbody flow does not influence the bistable behaviour. Furthermore, the flow was also found to be insensitive to the incoming flow at a small yaw angle.

Författare

Anirudh Narayan Rao

Chalmers, Tillämpad mekanik, Strömningslära

Jie Zhang

Chalmers, Tillämpad mekanik, Strömningslära

Guglielmo Minelli

Chalmers, Tillämpad mekanik, Strömningslära

Branislav Basara

Chalmers, Tillämpad mekanik, Strömningslära

Sinisa Krajnovic

Chalmers, Tillämpad mekanik, Strömningslära

Ämneskategorier

Maskinteknik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)