查询词典 aerodynamics

The characteristics of flow fields in annuluses between moving and static walls formed in train running through a tunnel is the important content of tunnel aerodynamics and also one of the main bases to study and solve the problem of the piston wind in tunnels.

列车通过隧道时，列车表面与隧道表面之间的环隙流场特性，是隧道空气动力学的一个重要内容，也是研究和解决隧道活塞风的主要依据之一。

No matter if it is about big displacement normal aspirating engines or highly efficient supercharging systems, or using the potentials of aerodynamics and thermodynamics, or optimising the electronic management of engine and gearbox with MKB you are on the right track.

无论是关于非增压大排量引擎、高效的增压系统、空气动力学和热力学潜能的深度利用，还是对引擎、变速器电子控制系统的优化，携手MKB无疑是你正确的选择。

The slipstream boundary conditions are imposed at the surface swept by prop to avoid the mass calculation of simulating the prop circumrotating with high velocity. The aerodynamics of aircraft can be simulated numerically by solving Euler equations exactly and efficiently.

为了解决精确模拟螺旋桨高速旋转带来的计算量大的问题，本文在螺旋桨旋转平面建立滑流边界条件，利用Euler方程可以准确高效的对全机气动力进行数值模拟。

The gas turbine engine windmilling is a state that when the engine doesn t work,the rotors temporarily operate at a sub-steady rotating speed due to the airflow ram and the co-work of aerodynamics,rotor inertia and drag torque.

由于很多燃气涡轮发动机都缺乏计算风车特性必需的低转速状态的部件特性，给计算发动机风车状态的特性带来了很大的困难。

This paper describes a theoretical two-dimension investigation on the aerodynamics performance of a self-rectifying axial-flow Wells turbine , a device extracting energy from reciprocation air.

文中利用二维模型分析了威尔斯透平的气动力性能，并以此为基础，设计并研制了多用途吸风式稳态透平试验台。

Highlights of the new material include a description of the incredible performance of bar-tailed godwits (7,000 miles nonstop from Alaska to New Zealand), an analysis of the convergence of modern jetliners, a discussion of the metabolization of energy featuring Lance Armstrong, a novel treatment of the aerodynamics of drag and trailing vortices, and an emphasis throughout on evolution, in nature and in engineering.

新材料重点包括一对黑尾豫令人难以置信的性能（7000英里从阿拉斯加到新西兰直飞）描述，是现代喷气式客机从波音和空中客车，一对代谢讨论能源具有兰斯阿姆斯特朗，一个空气动力学的阻力和尾随涡新颖的待遇，对整个进化重点，在自然和工程。

Part three contains chapters on autogiros and advanced aerodynamic analysis and a new chapter on the aerodynamics of wind turbines.

第三部分载有关于autogiros和先进的空气动力学分析和对风力涡轮机的空气动力学新的一页篇章。

Standard roof rails on all models feature crossbars that swing into position when needed to alleviate wind noise and to improve aerodynamics.

标准屋顶栏杆上的所有机型采用交叉起来立场是在需要时，以减轻风噪音和改善空气动力学性能。

At the same time, the resonant frequencies of four kinds of resonator are calculated by the programs which are made with Matlab software. The effect of resonator geometrical parameters on resonant frequency is theoretically analyzed. In order to carry out the acoustic and aerodynamics performances tests, seven resonators are designed and made, and a specialized engine intake silencer and exhaust silencers test bench was designed. The tests and analysis are performed as well.

在此基础上设计并加工了两类七个共振型进气消声器，研制了发动机进排气消声器性能测试实验台，开发了发动机进排气消声器声学性能测试软件，并在该实验台上测试了所设计的进气消声器静态工况下的传声损失，从实验的角度研究了共振腔的尺寸、形状对其共振频率的影响及其趋势。

Ultra-lightweight forged-aluminium 5-spoke wheels have fin-shaped plastic fairings to suppress air turbulence, reducing weight and improving aerodynamics while adding a sporty touch.

超轻锻造铝5辐轮毂有鳍状塑料整流罩镇压空气湍流，减轻重量，提高空气动力学同时增加了运动感。

John Robbins lives with his family in Santa Cruz, California.

约翰罗宾和家人居住在加利福尼亚州的圣克鲁斯县。

The international background is mainly the economic ties among different nations tented to be widen and deepen at the peace and development times.

国际背景主要是和平与发展时代条件下的世界各国经济贸易联系的日益加深。