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Detached-eddy simulations and analyses on new vortical flows over a 76/40° double delta wing

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  • The 4th Tsien Hsue Shen Memorial Lecture
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Abstract

Numerical simulations were performed on the massively separated flows of a 76/40° double delta wing using detached-eddy simulation (DES). A new type of cross-flow vortex is suggested. A vortex was initially generated near the junction of the strake and wing, which then moved towards the wing tip at certain wavelength and speed. Analyses were made in detail on the mechanism of the generation of the cross-flow vortex, that is, the inviscid cross-flow instability which differs from that of the swept blunt wing. Cross-section topology of the cross-flow vortex is also investigated, and the wavelength of the vortex array and the characteristic frequency are given. The analyses showed that the cross-flow vortices have an influence on the pressure distribution, which can cause a 10%–20% deviation from the averaged distribution.

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Authors and Affiliations

  1. State Key Laboratory of Aerodynamics, Mianyang, 621000, China

    Qin Li, Dong Sun & HanXin Zhang

  2. China and National Laboratory of CFD, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China

    Qin Li, Dong Sun & HanXin Zhang

Authors
  1. Qin Li
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  2. Dong Sun
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Correspondence to Qin Li.

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Li, Q., Sun, D. & Zhang, H. Detached-eddy simulations and analyses on new vortical flows over a 76/40° double delta wing. Sci. China Phys. Mech. Astron. 56, 1062–1073 (2013). https://doi.org/10.1007/s11433-013-5105-6

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  • DOI: https://doi.org/10.1007/s11433-013-5105-6

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