BI-STABLE STATES IN THE WAKE OF A 35 ◦ AHMED BODY AT YAW
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2017

Recent experimental observations by in the wake of a 35 ◦ back slant Ahmed body reveal the exis- tence of two stable states when the body is yawed [1]. The two flow states, flow state I and flow state II, are confirmed numerically by using the partially-averaged Navier–Stokes (PANS) formu- lation on unstructured meshes. Flow state I corre- sponds to a low drag/low lift state with the flow being fully separated, while flow state II corre- sponds to a high drag/high lift state, with the flow separating and reattaching over the back slant. For the Ahmed body at zero yaw angle (β = 0 ◦ ), flow state I is observed. This flow state is observed as the yaw angle is increased up to |β| ≃ 12.5 ◦ . As the yaw angle is increased beyond |β| = 12.5 ◦ , flow state II is observed. These findings are in good comparison with the experimental observa- tions of [1].

Författare

Anirudh Narayan Rao

Chalmers, Tillämpad mekanik

Guglielmo Minelli

Chalmers, Tillämpad mekanik, Strömningslära

Branislav Basara

Chalmers, Tillämpad mekanik, Strömningslära

Sinisa Krajnovic

Chalmers, Tillämpad mekanik, Strömningslära

Int. Conf. on Jets, Wakes and Separated Flows

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Maskinteknik

Strömningsmekanik och akustik

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C3SE (Chalmers Centre for Computational Science and Engineering)