查询词典 aerodynamic

In addition, aerodynamic roughness of stubble field increased with the increasing of stubble height, until the heights reached 15, 30, 15 cm for naked oats stubble, oilseed rape stubble and wheat stubble, respectively.

同类作物不同高度的留茬覆盖下，地表空气动力学粗糙度随留茬高度的增加而增大，在莜麦、油菜和小麦茬高度达到15、30和15 cm时显著增大，是3种留茬防风的有效高度。

Supersonic speed aircraft and guided aircraft missiles are subjected to rapid aerodynamic heating and rapid loading during their flight.

高速飞机及飞航导弹在飞行过程中受到气动力的快速加热和快速加载。

A Caret inlet was studied by testing. Basic aerodynamic characteristics of the inlet at supersonic speed are presented.

对一种Caret进气道进行了试验研究，给出了该型进气道超音速基本气动特性。

For the sweepback airfoil,the paper constructs its approximation models of structure disciplinary and aerodynamic disciplinary.

结果表明，用Kriging方法构造的近似模型精度较高，而且比较稳健。

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。

The aerodynamic characteristics of the cuted tip rhombus wing and double-delta wing of middling sweepback angle and aspect ratio about sixty type are investigated by a numerical method based on Eular equations.

采用Euler数值计算方法，对60多种中等后掠角及展弦比的切尖菱形机翼、双三角机翼纵向气动力特性进行了计算、分析和比较，从中筛选出16种切尖菱形机翼、14种双三角机翼进行了全机高速风洞实验研究，给出了机翼的展弦比、前缘后掠角、根梢比及几何扭转变化对全机升力、阻力及俯仰力矩的影响曲线和数据分析，在此基础上提出了用于定量估算两类机翼纵向气动力特性的关系式及修正因子。

According to the design performance aim, we estimate the overall parameters and complete the shape design of two schemes. Normal and tailless layouts are respectively applied. Then we use different airfoil and wing with low Reynolds number and the aerodynamic analysis of the result is achieved.

根据设计性能指标，进行总体参数估算，完成了两种方案的外形设计，分别采用了正常和无平尾的布局形式，进行了不同的低雷诺数翼型和机翼配置，并对设计结果进行了气动分析。

The India airforce also have Mirage 2000, the technology is about 20 years old, the engine is of low thrust due to the limitation of the French engine technologies and aerodynamic is not as good as F16 nor the JF17 due to its tailless design.

印度空军也有幻影2000 ，该技术是20岁，发动机推力低原因的限制，法国发动机技术和空气动力学不如F16或JF17由于其tailless设计。

According to the results of the tests, the unsteady aerodynamic was calculated at arbitrary angles of the tailplane and pitching frequency using the method of a data base model.

根据风洞实验结果，采用基于三角剖分数据库建模的方法，计算了任意平尾偏角和任意振动频率时的背景机动态气动特性，与实验结果比较表明，提出的有平尾偏角的建模方法能提供任意舵偏时的全机气动特性。

In order to improve the running stability of passenger train in strong crosswind ,its running condition on embankment while suffering from strong crosswind was simulated by using 3-D unsteady N-S equations and dynamic mesh technique,the relationships between aerodynamic force and train speed,crosswind speed and embankment tallness,and simulation result was compared with tunnel test result.

为了提高强横风作用下客运列车运行的稳定性，基于三维非定常方程，采用动网格技术，对强横风作用下的青藏线客运列车在路堤上运行情况进行了模拟，分析车速、风速及路堤高度与气动力之间的关系，并将计算结果与风洞实验结果进行对比。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。