| Citation: | ZHANG Qing，XUE Rongrong，MA Haotong.Preliminary aerodynamic exploration for bioinspired separated flow airfoil at low Reynolds number［J］.Journal of Aerospace Power，2022，37（7）：1516‑1527. doi: 10.13224/j.cnki.jasp.20210154
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In order to explore the type of airfoil suitable for low Reynolds number micro aerial vehicles，based on the observation of the wing shape of natural birds and insects during gliding flight in nature，a bioinspired separated flow airfoil composed of a sharpened leading edge flat plate and a circular arc airfoil was designed.Computational results demonstrated that the flow was forced to be separated at the sharp leading edge to generate low pressure flow and then be reattached at the upper surface of the rear arc airfoil to form stable low pressure vortical flow，thus high aerodynamic efficiency and strong turbulence resistance could be achieved.The separation could be fixed at the sharp leading edge point for upper⁃cropped flat plate.Compared with the single cropped flat plate，the lift coefficient of the bioinspired separated flow airfoil was improved significantly，by 112% at angle of attack 4°.In addition，the bioinspired separated flow airfoil can maintain high lift within a wide range of angle of attack between 4° and 20°，but the aerodynamic efficiency was higher at angles of attack lower than 4° because the drag increased rapidly with the increase of the angle of attack.
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