The aerodynamic shadow zone means an area of vortex caused by wing field, which lies in the leeward side and the top of building. 空气动力阴影区是在风的作用下建筑物背风侧和顶部的旋涡区。
The prediction of the separation trajectories of the external stores carried out on aircraft is an important task in the aerodynamic design area. 飞机投放外挂物的分离轨迹预测在气动设计领域是一个很重要的课题。
But the aerodynamic optimization of the turbomachinery blade, especially the transonic compressor blade, is still a challenge area. 但是叶轮机械,尤其是跨音速轴流压气机叶片的气动优化设计仍然是一个具有挑战性的研究领域。
This technique is cheap and universal, and there is a broad developing and applying prospect in aerodynamic test and civil-using industry area. 该测压技术廉价、通用,在空气动力实验及民用工业领域有广泛的开发和应用前景。
Numerical calculation result indicated that rotor down-wash had remarkable influence on aerodynamic characteristic and initial ballistic of the missile. The aerodynamic parameters changed quickly within the rotor wake area, while outside the rotor wake area, they changed smoothly. 数值计算结果表明旋翼下洗流对导弹的气动特性和初始弹道有显著的影响,在尾迹区内导弹的气动参数变化较大,尾迹区外气动参数变化比较平缓;
By analyzing flow field characteristics in wheel cavities and underbody, results demonstrated that aerodynamic drag coefficients of the wheel and the whole car change as the number and area of holes increases. 通过对轮腔内以及车身底部的压力等值线和涡量等流场特性的分析,得出随着辐板上开孔个数和面积的增加车轮的气动阻力和汽车总气动阻力系数的变化规律。
The aerodynamic resistance is modeled based on the free molecular flow theory. The effective area is calculated using the collection theory. 应用自由分子流理论建立气动阻力的模型,并利用集合理论计算气动阻力在空间站各组件上的有效作用面积。