The optimum conditions has been given and the overall yield of the three steps in rotation process is over 98%.
介绍了左旋麻黄素经过酰化、成盐、水解工艺过程转旋为右旋麻黄素。
Modeling and analytical investigation on rotor/wing aerodynamic interaction for tiltrotor aircraft;
倾转旋翼机旋翼对机翼气动干扰的建模及分析
Calculated method and parametric effect investigation of wing download of tiltrotor aircraft;
倾转旋翼机机翼向下载荷的计算方法及参数影响分析
Experiment on aeroelastic characteristics of tiltrotor aircraft in transition flight;
倾转旋翼/机翼耦合系统过渡状态气弹动力学试验研究
Multidisciplinary design optimization for aerodynamics/structural dynamics of tilt rotor blade;
倾转旋翼桨叶空气动力学/结构动力学多学科优化设计研究
Considering the operational characters of tilt rotor/propeller,a design method for tilt rotor/propeller is presented.
针对小型倾转螺旋桨独特的工作特性,在研究国外有关倾转旋翼桨叶设计现状的基础上,本文运用了遗传算法对桨叶的参数进行了寻优设计分析,以满足不同飞行状态的性能要求。
The new-concept variable diameter tilt rotor (VDTR) which has a combined aerodynamic advantage of a large-diameter rotor in hovering flight and a small-diameter rotor in cruise flight represents a key developmental direction of the tilt rotor.
新概念变直径倾转旋翼综合了悬停时大尺寸旋翼和巡航时小尺寸旋翼的气动优点,是倾转旋翼飞行器的一个重要发展方向。
<Abstrcat> In the present paper, the rotor wake of tilt-rotor aircraft is classified into the steady wake in hover and forward flight and the unsteady wake in transition flight, and a rotor free-wake analytical method for tilt-rotor aircraft has been developed based upon the Weissinger-L lifting-surface theory and rolled-up tip vortex model.
将倾转旋翼机的旋翼尾迹问题区分为二类,即悬停和前飞等状态的定常尾迹以及过渡飞行状态的非定常尾迹。
In this paper, the aerodynamic interactions between rotor/wing/ fuselage of tilt-rotor in hover and transition flight was calculated.
本文计算了倾转旋翼飞行器悬停状态和过渡飞行状态的旋翼/机翼/短翼/机身之间的气动干扰和气动特性,分析了其特点,并进行了初步的试验验证。
This thesis is aimed at the interaction aerodynamics problem on the rotor flowfield of a helicopter and a tilt-rotor aircraft by applying the rotor vortex theory and the panel method, and the major contributions of the author s research work are as follows:Based on the blade Weissinger-L model, rotor roll-up tip vortex model .
本文采用涡流理论方法和面元方法，对直升机和倾转旋翼机的旋翼下洗流场的干扰空气动力学问题进行了较为深入的研究。
Analysis and experimental study on aerodynamic characteristics of autorotating rotor;
自转旋翼气动特性分析及试验研究
Study on aerodynamic characteristics of autorotating rotor and jump takeoff performance of gyroplane;
旋翼机自转旋翼气动特性及跳飞性能研究
After an aerodynamic model of a autorotating rotor was established, the conclusion is drawn that the autorotating rotor of the gyroplane has a better aerodynamic condition and hig her efficiency compared with the rotor of the helicopter .
从建立自转旋翼的气动模型入手 ,通过与直升机正常工作状态下的旋翼的气动特性的对比 ,得出自转旋翼具有较好的气动环境和更高的效率 ;讨论了旋翼机的稳定转速与总距角、前飞速度以及桨盘迎角的关系 ,通过分析说明在设计旋翼机时 ,可选择一固定总距 ,使旋翼机在相当宽的飞行范围内 ,只需小幅度调整桨盘迎角就可保持稳定飞