Xiang Jinwu, Liu Kai, Li Daochun, Du Jianxun
School of Aeronautic Science and Engineering, Beihang University, 100083, Beijing, China.
School of Aeronautic Science and Engineering, Beihang University, 100083, Beijing, China.
Micron. 2017 Nov;102:21-34. doi: 10.1016/j.micron.2017.08.003.
The effects of micro-structure on aerodynamics of Coccinella septempunctata (Coleoptera: Coccinellidae) elytra in forward flight were investigated. The micro-structure was examined by a scanning electron microscope and a digital microscope. Based on the experimental results, five elytron models were constructed to separately investigate the effects of the camber and the local corrugation in both leading edge and trailing edge on aerodynamics. Computational fluid dynamic simulations of five elytron models were conducted by solving the Reynolds-Averaged Navier-Stokes equations with the Reynolds number of 245. The results show that camber and the local corrugation in the leading edge play significant roles in improving the aerodynamic performance, while the local corrugation in the trailing edge has little effect on aerodynamics.
研究了七星瓢虫（鞘翅目：瓢虫科）鞘翅微观结构对其向前飞行时空气动力学的影响。通过扫描电子显微镜和数字显微镜对微观结构进行了检测。基于实验结果，构建了五个鞘翅模型，分别研究前缘和后缘的曲面及局部波纹对空气动力学的影响。通过求解雷诺平均纳维-斯托克斯方程，对五个鞘翅模型进行了雷诺数为245的计算流体动力学模拟。结果表明，前缘的曲面和局部波纹对提高空气动力学性能起着重要作用，而后缘的局部波纹对空气动力学影响较小。
