Then I dared to lift my camera carefully from my belly and estimate an angle of a shot, and then I made several pictures across my head. 然后,我勇敢地小心地从腹部举起了相机,估计了拍摄的角度,当时我越过我的头拍了几张照片。
Effects of Vortex Generators on Maximum Lift and Stall Angle of Attack over Wings 旋涡发生器对机翼最大升力和失速迎角的影响
We put stress upon investigating the effect of changing lift drag ratio and reentry angle on reentry orbit. 着重研究了改变升阻比和再入角对再入轨道的影响。
Comparison between lift feedback control and fin angle feedback control of fin-stabilizer 减摇鳍升力反馈与鳍角反馈控制的对比
The vortex lift at a large angle of attack is calculated by the suction analogy principle. 对大迎角情况下的涡升力,采用吸力比拟原理计算;
New Method of Machining Internal Spiral Groove of a Big Lift Angle 大升角内螺旋槽加工新方法
The aerodynamic drag and lift of javelin increase with angle of attack. 标枪的气动阻力、升力随迎角增加而增加。
Can measure lift angle, lift height and lift force in real time; 能实时对主臂仰角、起吊高度和起升绳拉力进行测量;
The design of the lift controller based on Verilog HDL language at the angle of state machine is introduced. 从状态机的角度,介绍了一种电梯控制器的Veriloghdl设计方法。
The boundary layer edge conditions and the resistance and lift force coefficient in different Mach number and different angle of attack are worked out. Results of the method are in good agreement with the aerodynamics rules. 从而得到了边界层的外缘参数,计算出了弹丸在不同马赫数和不同攻角下的阻力系数和升力系数,分析结果符合空气动力学的基本规律。
This paper simulated the detent process of lift by adams, the effect of changing the angle of the safety clamp and the load is also be listed. 本文通过动态仿真软件adams,对电梯制动过程进行现场重现,得出安全钳角度和电梯载重对电梯制动效果的影响。
The unsteady lift characteristics of a delta wing with leading edge sweep angle 60 ° are investigated, when the wing is rapidly pitching up at incidence from 0 ° until 90 °. 对前缘后掠60°的三角翼在迎角0°~90°范围内快速上仰时的升力进行了测量。
The apex flap deployment had a promising effect on the lift after stalling angle, but it had little effect on the drag. 在失速迎角后,尖顶襟翼对升力系数的提高有明显的效果,而对阻力系数的影响不大;
Monitor system of safe supervisory system can reality show the parameter of moment percentage of both main hook and auxiliary hook, actual load force, lift angle, actual load height and load range. 安全监测系统的显示系统可随时显示主钩和副钩的作业力矩百分比、实际载荷、主臂仰角、实际起吊高度、以及作业幅度等参数;有预报警、超限报警和超限控制功能。
The unsteady hydrodynamic characteristics of the lift and moment of lift fin with fin angle is mainly studied in the paper. 重点研究了升力鳍升力及转矩与鳍角的非定常水动力特性。
A Big Cheater Research on the Strake Wing Vortex Lift of Flighter at High Angle of Attack 战斗机边条翼大迎角涡升力研究
Research on Control Method of Lift-angle Integrated Control Fin Stabilizer 升力/鳍角综合控制减摇鳍控制方法的研究
It is found that the variation of planforms and geometrical parameters can effect only the drag reduction but little to the low lift in low angle of attack conditon. 发现单纯改变涡襟翼的形式和参数能提高减阻效果,但不能改变小迎角下升力过小的现象。
Aiming at the difficulty of machining internal spiral groove with big lift angle, several methods are presented. 针对大升角的内螺旋槽加工的难点,提出了几种加工方法,并制造出了样机。
The effects of injection pressure, ambient pressure, needle lift and designed spray angle on the large-scale air vortex A and B are investigated. 喷射压力、环境压力、针阀升程及喷雾锥角对喷雾场内气流运动特征的影响被着重分析。
The throttle is removed in this system and the valve is driven by a mechanical-hydraulic system, thus realizing the continuous variability of the maximum valve lift and the opening angle. 该机构取消了节气门,由机械-液压机构联合控制气门运动,从而实现气门最大升程和开启持续角的连续可变。
And comparing with standard fin-type pool experimental data under the same condition, we find that the imitating humpback whale fin stabilizer fin-type can provide more lift in the same angle of attack. 在与相同条件下的标准鳍型水池实验数据进行对比我们发现在攻角相同的情况,仿驼背鲸鳍这种鳍型能提供更大的升力。
Under a certain angle of attack, the lift of fin Stabilizer increases as the increase of the angle of attack. 在一定攻角下,它所产生的升力随着攻角的增加而增加。
The test result showed that the boom conversion mechanism could complete the movement of boom lift and angle change, so the boom sprayer and the tunnel sprayer could be transformed automatically, and the design is feasible. 试验结果表明:喷杆转换机构物理样机能够完成喷杆自动升降和喷杆变角的动作,实现喷杆式与隧道式机构的转换,机构设计方案可行。
So the deform fin Stabilizer at the same angle of attack can produce a greater lift at the same angle of attack as well as improve the stall angle, and enhance the anti-rolling capacity of fin stabilizer. 从而使减摇鳍在相同的攻角下能产生更大的升力以及提高减摇鳍的失速角,提高减摇鳍的减摇能力。
The differences in fluctuating amplitude are quantitatively compared, and an explanation is given by showing the sectional angle of attack and coefficient of lift variation curve with azimuth angle. 对载荷振幅的差别进行了定量的比较,并通过叶片截面攻角和升力系数随方位角的变化曲线对其原因进行了解释。
Ice accretion on aircraft wings is a hazard phenomenon which leads to reduced lift, increased drag, decreased stall angle of attack and degradation in operation and stability. 飞机机翼积冰是一种严重影响航空安全的现象,它减小飞机升力、增大阻力、减小失速迎角,同时改变飞机的操纵和稳定性能。
The results show that the effects of ambient pressure, injection pressure and needle lift on the spray angle is very small. 结果表明:环境压力、喷射压力及针阀升程的变化都对喷雾锥角影响很小。