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To reveal aft end internal flow feature of a solid rocket motor with submerged nozzle, a two dimension cold flow test model with rectangular channel was designed The cold gas simulation was based on geometric similarity and aerodynamic analogy Mean and fluctuating velocity field was measured using phase doppler particle analyzer It showed that the flow separates at upstream of the submerged nozzle and reattaches on the tip of the nozzle nose A relatively steady recirculation zone formed in...

为了揭示含潜入喷管的固体火箭发动机尾部流动特征，按照几何相近和气动相似原则设计了通道为矩形的二维冷流实验模型，利用相位多普勒粒子分析仪对燃烧室尾部气流的时均速度和湍流脉动速度进行了测量。实验结果表明气流在潜入喷管入口上游发生分离，再附点位于喷管前端部外侧，背壁空腔内形成一个较为稳定的回流区，流场的轴向和横向湍流强度都比较大

These earliest F-16s are recognizable in photos by their black radomes and lack of threat warning receiver fairing protruding aft and just below the rudder in production F-16s.

可以根据照片上的黑色雷达天线罩以及缺少生产型F-16后机身上方向舵下方非常显眼的威胁警告接收器识别出这些最早的F-16。

Using test apparatus underwater explosion,it is studied that the desensitization phenomenon of emulsion explosives which is sensitized by glass micro-balloons and expanded perlites in different dynamic pressures,and the desensitization degree of two kinds of sensitized methods are compared at the same dynamic pressure fore-and-aft.

利用水下爆炸测试系统，对不同动压作用后玻璃微球和膨胀珍珠岩敏化的乳化炸药的减敏现象进行了研究，比较了在相同动压作用前后两种敏化方式的乳化炸药的减敏程度。

This is because the forward and aft ends of the keel box are narrow, and medium weight fiberglass cloth does not lie well on the mold when you round corners.

这是因为前方和尾部的两端龙骨方块狭窄，和中等重量的玻璃纤维布，并不在于，以及在模具上，当你一轮的角落。

The taller mast, whether forward or aft, of a two-masted sailing vessel.

主桅双桅帆船中较高的桅杆，无论是位于船头的还是船尾的

The ship has six cargo holds, engine room and accommodation aft, transom stern, bulbous bow, raked stem, one streamlined rudder with Costa Bulb and one bow thruster.

均匀载荷对坦克顶部20t/m2加强对抓斗操作和buldozer的保护，并载有三名热卷板直径1500毫米x 1500毫米，重15吨层次她是B型单螺杆干舷，与一控制间距由一个低速发动机驱动的螺旋桨安装马达的船。

Simulation results show that the method solves dynamical product of HRTF data based on moving sound sources and the smooth transition of the fore-and-aft sound sequence signals. The method is more reliable and accurate than other methods, and realizes indoor acoustic simulation based on dynamic mechanism.

仿真结果表明，该方法较好地解决了运动声源HRTF数据的动态产生和前后声信号段平滑过渡问题，具有更好的真实性和精确度，实现了基于动态机制的室内声学仿真方法。

Simulation results show that the method solves dynamical product of HRTF data based on moving sound sources and the smooth transition of the fore-and-aft sound sequence signals.

仿真结果表明，该方法较好地解决了运动声源HRTF数据的动态产生和前后声信号段平滑过渡问题，具有更好的真实性和精确度，实现了基于动态机制的室内声学仿真方法。

Rotation of the aft quadrant moves a control rod connected to a torque tube.

后扇形盘的转动带动一个连接着一个扭力管的操纵杆。

Rotation of the aft quadrant moves a control rod connected to a torque tube.

随着脚蹬的移动，使得前扇形盘转动，前扇形盘由线缆连接到后扇形盘。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。