尾流

According to the understanding of the flow characteristics, a mechanism of formation of vortex streets has been proposed to be the absolute instability of the wake, and several methods of flow control have been developed and shown successful.

根据表面流动及尾流特性的研究结果，从流动稳定性的角度提出了尾流中涡街产生的机理，在于尾流中存在着绝对不稳定的区域。基于对流动特性的理解，从改变流动稳定性的角度，寻求各种流动控制方法。试验结果表明这些方法是成功的。

Aiming at the diversification of function system and homing modes in the development of submarine-launched torpedo, this paper analyses the advantages in operational application of wake homing torpedo based on its mechanism, such as stronger counter-countermeasure, higher speed, and higher target acquisition probability for selected target. It also analyses the limitations in tactics, such as limited attacking speed and the types of attackable targets, greater loss in torpedo range, difficult combination with wire-guidance, and inaccurate attack on moving targets.

针对国内外潜射鱼雷在功能体制和制导方式等技术环节多元化发展的局面，基于尾流自导鱼雷制导原理，分析了尾流自导鱼雷在作战使用上的技术优势：抗干扰能力强，适宜高速制，可选择攻击目标和捕获概率高；以及其战术局限性：可攻目标的类型及速度受限，鱼雷航程损失大，与线导结合困难，对机动目标攻击效果较差。

Based on wake features and operational principle of wake homing torpedo, this paper introduces some methods of soft kill, hard kill and non-kill, such as gas generator, magnetic wake, torpedo net defense, depth bomb, anti-torpedo torpedo, stealth, and evasive maneuver.

该文基于尾流特征及尾流自导鱼雷工作原理，介绍了用于对抗尾流自导鱼雷的气幕弹、磁尾流、拖网、深水炸弹和反鱼雷鱼雷等几种软杀伤和硬杀伤方法以及隐身技术和机动规避等非杀伤方法，总结了舰船对抗鱼雷攻击的3个关键环节包括高性能鱼雷报警系统、快速反应的水声对抗系统和多功能的水声对抗设施，旨在为有效防御尾流自导鱼雷提供思路。

Based on wake features and operational principle of wake homing torpedo , this paper introduces some methods of soft kill , hard kill and non-kill ,such as gas generator , magnetic wake , torpedo net defense , depth bomb , anti-torpedo torpedo , stealth , and evasive maneuver. We summarizes three key points in the defense against wake homing torpedo , including high perfo口nance torpedo alarm system , rapid response acoustic countermeasure system , and multi-functional acoustic countermeasure device , to provide approaches to effectively countering wake homing torpedo.

该文基于尾流特征及尾流自导鱼雷工作原理介绍了用于对抗尾流自导鱼雷的气幕弹、磁尾流、拖网、深水炸弹和反鱼雷鱼雷等几种软杀伤和硬杀伤方法以及隐身技术和机动规避等非杀伤方法总结了舰船对抗鱼雷攻击3 个的关键环节包括高性能鱼雷报警系统、快速反应的水声对抗系统和多功能的水声对抗设施旨在为有效防御尾流自导鱼雷提供思路。

Based on experimental exploration made by Merritt etc. a method is developed to determined the wake shape and size of a submarine.

在综合Merrit等人对潜艇尾流实验研究的基础上，给出了潜艇尾流尺度的计算方法及典型算例结果。

Firstly, we studied the relationship between the amplitude of the wakefield and pulse length and an optimum length exists which equal to 〓 for Gaussian profile.

在MP-LWFA中，我们研究不同的脉冲长度、不同的脉冲间隔对产生尾流场的影响，着重讨论尾流场的饱和机制。

The results show that: 1 trashracks do not interfere with one another when the trashrack spacing-to-width ratio is not small than 4, 2 turbulent intensity of the wake flow for the trashrack with streamlined profiles is much small.

用该算法对大长宽比的钝体尾流三维超声波流速仪测量数据的分析表明：1钝体间距与宽度之比大於4时，钝体间的相互影响可以忽略不计；2流线型的钝体尾流紊动强度较小。

The calculation results of some examples are given. In the unstratified case, the cake cross section at any point is circular. When the flow is stratified, buoyancy cause the wake, which initially grows at the same rate in all directions, to collapse in the vertical direction and flatten out horizontally producing a very wide and thin rectangular shape.

在稳定层化海洋中，潜艇尾流以圆锥形增长；在非层化海洋中，初期尾流也以圆锥形增长，但在浮力作用下，尾流垂向增长崩溃，然后以又薄又宽的近于矩形截面增长，最后垂向尺度趋于常值。

In this paper, it compares turbulence separation standers of CCAR, FAA and CAA, and calculates them by given evaluating method. It also analyzes the influence of turbulence separation.

本文比较了国内、FAA、CAA不同尾流间隔标准，并利用提出的评估方法进行计算，并分析了尾流间隔对容量的影响。

Results show that in hover the fuselage normal force and pitching moment are relatively high due to the influence of rotor/wing downwash; and in low speed forward flight, the downwash have strong interaction on the normal force and pitching moment of fuselage due to the big dimension horizontal tail; the effects of downwash on the fuselage rolling and yawing moments are little and the influence on fuselage side force is considerable.

结果表明，悬停时受主机翼高速旋转产生的下洗尾流影响，机身产生了较大的法向力和低头力矩；前飞时下洗尾流对机身的法向力和俯仰力矩有比较严重的干扰，对滚转力矩和偏航力矩干扰较小，对侧向力有一定影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了