后掠机翼

Using the directional derivative formula, the governing equation is discreted in the physical domain in which a nonorthogonal grid system is used. Two kinds of AF2 schemes, i. e. AF2-plane relaxation and full implicit AF2, for the TSD equation are proposed. Numerical results show that the full implicit AF2 scheme converges faster than AF2plane relaxation scheme. For the rectangular wing and swept wing, the results of the present method are compared with FP results, and the agreement is good.

采用适合于梯形机翼和后掠机翼的斜网格，利用方向导数公式直接在物理空间对主管方程进行离散；将近似因式分解方法应用于绕机翼的跨音速小扰动势流问题，提出AF2—面松弛和AF2全隐式两种迭代格式，并对它们的收敛速度进行比较，结果表明后者明显快于前者；直机翼和后掠机翼的算例表明，本文方法的结果与精确势流方法的结果吻合良好。

Capable of Mach 2.35, it has variable sweep wings which can be set to 16 degrees of sweep during takeoff and landing, 72 degrees for high speed flight, and 45 degrees for mid-range operation; the dogtooth you can see in the outer wing section fits in to the inner wing section when in the 16 degree position.

他能够达到2.35马赫，拥有可变后掠翼，在起飞和降落的时候保持16度，高速飞行保持72度，中距离任务保持45度。外部的机翼尖端在16度时恰好能嵌入机翼内段。

Thirdly, the subsonic, transonic and supersonic flutter critical speed of wings and aircraft is numerically simulated. Some numerical results are in good agreement with experimental data.

分别以某后掠机翼和超临界机翼为算例，对机翼的静气动弹性问题以及基于静气动弹性的型架外形优化设计和飞行姿态确定进行研究，计算结果和有关文献的结果进行了比较，吻合很好。

The five methods are tested on a 2-D test function ,a straight airfoil and a sweepback airfoil. For the straight airfoil,the paper constructs its approximation models of structure disciplinary, aerodynamic disciplinary and stealth disciplinary.

用这五种方法分别构造二维测试函数的近似模型，直机翼结构学科、气动学科和隐身学科的近似模型和后掠机翼结构学科、气动学科的近似模型，并总结这五种方法对二维测试函数、直机翼和后掠机翼各学科近似的适用性。

With the design method described and design standard proposed in this thesis, a transonic NLF wing has been designed. Calculation shows that this NLF wing has, even in case of full turbulent boundary layer flow, good transonic aerodynamic characteristics.

本文结合民机预研项目，根据后掠机翼层流流动的特点和已有的经验提出了自然层流机翼的设计准则，用本文的三维机翼设计方法设计了一个跨音速自然层流机翼。

The largest amplificatory wavelength in this experimental situation,found through analysis and numerical calculation,is 4.0 mm,which is validated by Naphthalene visualization.

通过升华法试验验证了理论分析与数值计算结果。在试验中使用丝网印刷技术在后掠机翼前缘添加粗糙带，成功地引入了理论计算的最大放大率波长。

The Searcher 2s have backswept wings, a new engine, a new navigation system and advanced communications systems.

搜索者II采用后掠机翼样式，安装一台新的发动机、一套新的导航系统和先进的通信系统。

My main research work is listed as follows: 1. Considering structure characteristics of high aspect ratio flexible wing, features of flat-straight-wing and backswept wing, the aeroelasticity of high aspect ratio of flexible wing, its structure model and aeroelastic dynamics equation of flexible wing have been studied.

针对大展弦比柔性机翼的结构特征，并考虑到平直机翼和后掠机翼的特点，对大展弦比机翼的气动弹性进行分析，分别建立其结构模型，并推导出柔性机翼气动弹性的动力学方程。

The transonic flutter characteristics are investigated for several wings, empennage and wing-body configuration, flutter critical speeds are numerically simulated.

以ONERA M6机翼和无后掠矩形机翼为算例，分别对它们的跨音速定常和非定常粘性绕流进行了数值模拟，计算结果和有关文献的结果进行了比较，吻合较好。

The WZ-5 has mid-mounted, swept-back wings with angular tips.

WZ-5采用中-置、后掠机翼。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。