The three - dimensional ( 3d ) euler equations are applied to the study of numerical simulation of chemical non - equilibrium oblique detonation wave standing on an accelerating projectile with attack angle 摘要采用三维非定常化学反应控制方程组对驻定在带攻角高速飞行弹丸上的斜爆轰波流场进行了数值模拟。
Fixed the angle of attack , in subsonic situation , the drag coefficient was reducing with the velocity increasing ; in supersonic situation , the drag coefficient was increasing with the velocity increasing 攻角不变,亚声速情况下,阻力系数随速度的增大而减小;超声速情况下,阻力系数随速度的增大而增大。
The spin , sometimes called the negative spin , occurs when the angle of attack of the canopy is increased and one side is stalled causing it to drop almost vertically and spin on its yaw axis 旋转，有时候叫反向旋转，发生于当伞的攻角增加，而且单侧失速时，引起几乎垂直地下坠，同时绕著它的偏移轴心旋转。
For instance , the velocity distribution can be prescribed for the upper surface at a high angle of attack while simultaneously the velocity distribution can be prescribed for the lower surface at a low angle of attack 比如可指定的速度分布在水面上的高攻角的同时,可以在指定的速度分布在低角度下地面攻击
Based on wind tunnel tests , wind pressure distributions on cylindrical shells with different aspect ratios were measured simultaneously in wind tunnel with rigid models under different terrain types and attack angles 摘要基于刚性模型的风洞试验，在不同风攻角及场地条件下，对考虑不同长跨比的柱面壳体表面风压分布进行了同步测量。
A simplified theoretical model has been established to describe the big yawed rod penetration into semi - infinite rolled homogeneous armor ( rha ) targets at normal incidence , the effect of ballistic yaw is quantitatively described in the rate of penetration 本文建立了大攻角的长杆体垂直侵彻半无限靶的简化物理模型，定量地分析了大攻角对垂直侵彻的影响。
Without spinning or attack angle , the three dimensional interaction flowfield over projectile with lateral jets is numerically simulated successfully , and unified interaction flowfield with lateral jets and base bleed is also calculated 在无旋转、无攻角条件下完成了弹丸侧喷三维干扰湍流流场数值模拟，并完成了弹丸底喷流-侧喷流共同干扰流场的一体化计算。
The relevance functions between total pressure recover coefficient and the parameters ( mach number , angle of attack , flow coefficient , angle of sideslip ) for subsonic submerged inlet in turbojet and turbofan engine were investigated 摘要根据某埋入式进气道试验数据建立了计算埋入式亚声速进气道总压恢复系数的经验公式，表现为关于马赫数、流量系数、攻角、侧滑角的函数。
6 . utilizing the new robust decoupling control method which is put forward above , the design problem of decoupling controller for large angle of attack reentry missile ' s attitude control system is mainly investigated 6 、针对大攻角再入飞行导弹通道间存在的气动耦合现象，以及实际飞行中存在的个确定因素，分析了其进行解耦控制的必要性；探讨了本文提出的基于互补灵敏度成形和h 。
The accomplishing method is that the attack angles of aerodynamic forces are made changing along transmission line so aerodynamic forces are made being approximate balance state by spiral winding plastic belt on transmission line 实现的方法是在输电线螺旋地缠绕横截面为三角形的塑料带，使气动力的攻角沿输电线的长度方向周期性地变化，使作用在输电线上的气动力近似地成为平衡力系。
