- 更多网络例句与尾迹相关的网络例句 [注：此内容来源于网络，仅供参考]
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In addition,Various methods of stability analysis of wakes behind bluff bodies arediscussed,among which the general theory of absolute/convective instability is strictlyformulized from stability equations of viscous flow;the theoretical foundation of stabil-ity analysis of time-average flows is also discussed from basic equations of fluids,andthe reason for the stability analysis of time-average flow can predict the frequency inthe saturation state is explaned.
此外，讨论了钝体尾迹稳定性分析的各种方法，其中从粘性流的稳定性方程出发严格推导了绝对/对流不稳定性的理论公式；从基本方程出发探讨了采用时均流场作稳定性分析的可行性，并解释了用时均流场作稳定性分析可以更好地预示饱和频率的原因。
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In Chapter 2, a simplified analytical model is presented for the analysis of the BVI mechanism, adopting the Beddoes' prescribed wake model. By this model, the azimuthal location and miss-distance of the BVI and the radiation directivity of the BVI noise are calculated and discussed, and some conclusions are obtained.
在第二章，使用Beddoes预定尾迹模型，建立了一个用于旋翼桨-涡干扰特性机理分析的简化数学模型，分别对旋翼桨-涡干扰位置、桨-涡干扰距离和声辐射方向性等进行了计算和分析，得出了有意义的结果。
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An improved model of curved vortex element on the circular arc for rotor free wake analysis is presented.
涡元技术是尾迹分析的基础，本文第二章改进了先前的曲涡元模型。
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Based on the generalized dynamic inflow theory and classic non-steady aerodynamic loading theory, a real-time model is obtained by establishing wake distortion and decay, Then a real-time quasi-steady turboshaft twin-engined model is founded by simulating the rotor speed fluctuation.
在广义动态入流理论的基础上，基于经典非定常气动栽荷理论，建立了尾迹畸变和尾迹耗散的实时分析模型。为模拟大负载情况下旋翼转速的波动，建立了双发准定常涡轮轴发动机实时仿真模型。
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The numerical results show that:(1) the throughflow wake is considerably influenced by the tip clearance. The low-kinetic-energy fluid accumulated in the shroud/pressure side of the unshrouded impeller, but in the shroud/suction region for 0.0 tip clearance;(2) there possibly exists an optimum size of the tip-clearance which is not the zero tip clearance to make the flow loss minimized.
研究结果表明，(1)NASA低速大尺度离心压缩机半开式叶轮的低速尾迹区在压力面与轮盖的角区，而相应的闭式叶轮的低速尾迹区聚集在轮盖的中心位置；(2)数值实验表明，叶顶间隙并非越小越好，可能存在一个最优间隙，使得叶轮流动损失最小。
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"You can see airplane contrails, and occasionally at the end of an airplane contrail, you will see a glint of sunlight off the airplane," Lu says. And very occasionally, you do see other satellites go by.
&你可以看到飞机尾迹，偶尔在尾迹的一端你可以看到闪亮的飞机&LU说，更偶然的情况下，你可以看到飞经的其他人造卫星。
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The shear layer vortices dominate in the initial portion of the jet, which are a result of the K-H instability. The crossflow encounters an adverse pressure gradient ahead of the jet and separates to form horseshoe vortices under the pressure downstream, and they develop into the wake. The wake vorticity comes into being in the actions of an adverse pressure gradient and a wall-normal component of vorticity, which originates from the wall boundary and is entrained into the jet. The shear layer vortices encounter adverse pressure gradients in the lee of the jet and break down, leading to the formation of the CVP and the CVP is the most important characteristic of the jet in crossflow.
文中指出：剪切层涡源于射流与横流之间的K-H不稳定性；马蹄形涡的产生是由于射流喷口上游迎风侧的壁面边界层内存在逆压梯度，使流动发生了分离，在下游逆压梯度的挤压作用下，形成了马蹄形涡，马蹄形涡向下游发展，进入尾迹区；在逆压梯度和法向涡生成项的共同作用下产生了尾迹涡，尾迹涡源于壁面边界层，止于射流，并将部分涡量向上输运至射流内部的CVP；CVP是横向紊动射流的重要特征，剪切层涡破裂后，在逆压梯度的作用下CVP形成。
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The main contents and results of research in this paper are shown as following: It is important to built the motion model of a virtual system. As the virtual object is the submarine in this simulation system, we studied on the motion model of the submarine and gave the submarine six DOF space motion equation MultiGen-Paradigm corporation's modeling software named Creator is used, the modeling of all entities and 3D terrain in virtual ocean environment is accomplished. Then introduced the theory of Large Area Database Management and realized the Large area database management; In the course of 3D scene simulation, Vega is utilized to develop the project. The building of 3D scene is done, which includes the simulation of static and dynamic ocean surface, realization of ocean wave, simulation of bow wave and stern wake, utilization of lighting and material, simulation of cloud and fog, kinematics' modeling of submarine etc.
论文的主要研究工作和成果包括以下一些内容：建立虚拟对象的运动模型是构造一个虚拟系统的关键所在，建立的运动模型准确与否直接关系仿真对象模拟的逼真度，由于本仿真系统的虚拟对象是潜艇，所以对潜艇的运动模型进行了研究，给出潜艇空间六自由度运动方程；利用MultiGen-Paradigm公司的Creator建模软件完成虚拟海洋环境中个实体模型建模和三维海底地形模型的建模；然后介绍了大地形数据库管理(LADBM，Large Area Database Management)技术的基本原理，实现大地形数据库管理；在三维场景仿真中，使用Vega驱动软件进行软件开发，完成了三维场景空间的建立，主要包括动态和静态海洋的仿真、海浪、船首波浪和传尾尾迹的实现，灯光和材质的使用，云和雾的模拟等。
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This method is based on the blade second-order lifting-line model, the full-span free wake model, panel model for the fuselage and rotor trim model. By iterating induced velocities on the fuselage surface caused by rotor/wake and those on the rotor plane/wake caused by fuselage, a comprehensive analytical model is established.
该方法建立在桨叶的二阶升力线模型、旋翼的全展自由尾迹模型、机身的源面元模型、旋翼的配平模型的基础上，通过迭代旋翼/尾迹在机身上的诱导速度和机身在桨盘平面、尾迹定位点的诱导速度，形成一个全耦合的综合分析模型。
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A calculated model for predicting wing download of the tiltrotor in hover and forward flight was given according to the aerodynamic interaction effect of the rotor downwash flow on the wing.
该模型中，旋翼在机翼处产生的诱导速度以及对机翼干扰的旋翼尾迹边界基于Weissinger-L升力面理论和自由尾迹方法计算，以考虑倾转旋翼桨叶的大负扭转和尖削带来的较大三维影响，机翼表面流则区分为弦向流及展向流，以分别计算向下载荷。
- 更多网络解释与尾迹相关的网络解释 [注：此内容来源于网络，仅供参考]
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unidentified contrail：未识别飞机的尾迹
unidentifiable parameter 不可识别的参数 | unidentified contrail 未识别飞机的尾迹 | unidentified growth factor 未知的生长因子
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contraindication in acupuncture：禁刺
contrail-formation graph 凝结尾迹形成图 | contraindication in acupuncture 禁刺 | contralateral reflex 对侧反射
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distrain：扣押财产
distrail 耗散尾迹 | distrain 扣押财产 | distrainee 被扣押人
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printer's error：误植
误杀罪/excusable homicide | 误植/printer's error | 雾化尾迹/vapour trail
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track scarifier：轮迹消除器,轮辙扒松器
214 TPHC tail pipe hydrocarbon 排气尾管碳氢化合物 | 216 track scarifier 轮迹消除器,轮辙扒松器 | 217 tracked cars 履带车,履带式车辆
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track scarifier：轮迹消弭器,轮辙扒松器
214 TPHC tail pipe hydrocarbon 排气尾管碳氢化合物 | 216 track scarifier 轮迹消弭器,轮辙扒松器 | 217 tracked cars 履带车,履带式车辆
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vapor trail：雾化尾迹
rotor cloud -- 滚轴云 | vapor trail -- 雾化尾迹 | artificial satelite -- 人造卫星
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vaporability：蒸发性,挥发性,汽化性
vaporable 可挥发的,可蒸发的,可汽化的 | vaporability 蒸发性,挥发性,汽化性 | vapor trail 雾化尾迹,凝气尾迹
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Trailers：震尾
断层迹 trail of the fault | 震尾 trailers | 归并现象 trailing
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condensation trail：凝结尾迹
condensation sensor || 冷凝探测器 | condensation trail || 凝结尾迹 | condensation zone || 聚合带