mach number

In among, the control system of MACH number is a core system, which guarantee realizing performance for NF-6 wind tunnel.

其中马赫数控制系统是保证整个风洞性能指标的核心系统。

The hot air permitted higher speeds before the critical Mach number was exceeded

热空气可使之在超过临界马赫数之前达到更快的速度。

A code is developed to predict the Mach number compressible fluid flow with pressure-correction algorithm . 2 .

开发了适用于低马赫数流动的可压缩压力修正算法程序.

Given tabulate ballistics of an air to ground weapon, the genetic algorithm ( GA) is applied to identity the weapon's characteristics, namely, a parameterized drag efficient as a function of the mach number of the weapon travelling in atmosphere.

利用空对地武器的弹道表，用遗传算法（Genetic Algorithm，GA）辨识武器的阻力特性，即阻力系数与武器飞行马赫数之间的参数化函数关系。

Some special requirements must be considered in rocket design, such as the flight Mach number during sampling flight, the flow coefficient and aerodynamic characteristic of sampling diffuser, the efficiency of filter material and others.

该火箭的设计需要考虑取样飞行马赫数、取样扩压器的流量系数和气动特性、取样过滤材料的效率等特殊要求。

Research on the Mach number control system in NF-6 wind tunnel

NF-6风洞马赫数控制系统研制

In addition, it is found that the Mach number Z in the intake pipe is no longer a monotropic function of engine speed, and is also not a constant at engine constant speed and variable load.

此外，还得知进气马赫数Z不是转速的单值函数；在定转速而负荷不同时，它不是常数。

The act time is independent of the impact Mach number approximately in lower impact Mach number, the peak pressures and the peak velocities increase along the radial direction outwards, and some experimental evidence supports this result.

在较低的冲击马赫数范围内，作用时间近似地和冲击马赫数无关；压力峰值和测向速度都是沿着径向向外递增，这和实验结果一致。

There are shock lets in the mixing layer with convective Mach number 1.2.

高对流马赫数混合层中存在较弱的小激波间断.

The PAW arc can be dealt in a laminar incompressible state judged by the Mach number and the ratio of effective viscosity and dynamic viscosity.

通过计算马赫数、有效粘度和动力粘度之比，认为等离子体电弧处于层流不可压缩状态。

It can insulate the upstream and downstream flow field resulting in the noise drop of the text section from the downstream and can control the Mach number exactly in the transonic state.

它在跨声速状态下具有隔离上下游流场从而降低试验段噪声，精确控制马赫数的作用。

The result shows that with the increase of the inner contraction ratio, the starting Mach number of inflow is increases.

研究表明，当进气道收缩比增大时，进气道的进口起动马赫数增大；

The higher speeds in the hot air did not exceed the critical Mach number.

热空气中的更高速度没有超过临界马赫数。

Under the high-speed airflow disturbance condition, the combustion time of the igniter declined when the Mach number increased, the combustion was fierce, and the flame length was several times longer then that under the static state.

在高速气流扰动条件下，点火具燃烧时间随马赫数增大而减小，点火具燃烧猛烈，火焰被拉长数倍。

The profiles of density, velocity, temperature, pressure and Mach number can be obtained by the computation.

通过计算可以得出密度 、 速度 、 温度 、 压力和马赫数的分布.

Aimed at the jet noise which is induced by the expand structure and tail tube in the resistant muffler, a finite element model at low Mach number was developed.

针对抗性消声器中扩张结构和尾管引起的射流噪声问题，建立了低马赫数射流噪声有限元分析模型。

The longitudinal and lateral aerodynamic characteristics of tactical missiles for the conventional and canard configuration can be calculated using this method at Mach number range from 0 to 3.5, angle of attack and yawing angle from 0 to 20 degrees.

本方法可用于计算来流马赫数为0到3.5左右、攻角和侧滑角为0°到20°左右、正常式或鸭式布局的战术弹纵、横向气动力系数。

The performance of pressure regulating valve will directly affect the operating pressure and the control accuracy of test section Mach number.

调压阀性能的好坏，直接影响到风洞运行压力，试验段马赫数控制精度。

The test Mach number range is 0.5 to 0.9. The Reynolds number range is 2 × 106 to 1 × 107. The corrected results are compared with the foreign newest corrections and Navier-Stokes free-air solutions.

试验马赫数范围是0.5到0.9，试验雷诺数范围是2×10~6～1×10~7。

Research on Mach number control compensation decoupling for wind tunnel

风洞流场马赫数补偿解耦控制研究

The hot air permitted higher speeds before the critical Mach number was exceeded.

热空气可使之在超过临界马赫数之前达到更快的速度。

The dynamic performance of a ram air system will vary with Mach number and altitude and this tends to follow the aerodynamic characteristics of the missle.

像导弹空气动力特性一样，冲压空气式系统的动态特性随马赫数和高度的变化而变化。

The limit Mach number as the chock condition in hood depends on its loss value.

缸发生阻塞时的极限马赫数取决于其损失值的大小。

the void boundary will decrease, the electric field intensity will increase and mach number will decrease when raise the ionization rate or the negative ions content.

研究结果表明电离率的增加和负离子含量的增加均能使空洞边界减小，空洞内部的电场强度增加，马赫数增加。

two dimensional irrotational mixed subsonic and supersonic flow of a compressible fluid and the upper critical mach number

可压缩流体二维无旋亚声速和超声速混合型流动及上临界马赫数

a mach number flutter trend of a typical airfoil section with a control surface is analyzed and the results obtained agree well with those with cfd/ csd direct coupling method.

分析了典型三自由度二元机翼的颤振边界，分析结果与CFD/CSD直接耦合方法吻合。

A simple device, that can form continuously changed Mach number flow only by adjusting the wedge angle, was designed availing the theory of shock wave reflection.

利用消波反射波系的基本原理，设计了一种只需要调节楔板角度就可以实现马赫数连续变化。

This paper discusses the index curve as contour in the application of pressure regulating valves, introduces the details of the design method, and analyzes characteristics of pressure regulation under different Mach number.

本文论述了半截式指数型面曲线在环状缝隙式调压阀上的应用，介绍了详细的设计计算方法，分析了在不同马赫数下的调压特性。

In this paper, the Mach number control system in NF-6 wind tunnel is introduced, especially in detail for the compressor rotary speed control sub-system, the compressor stator vane control sub-system and the second throat control sub-system. angle.

笔者介绍了NF6风洞马赫数控制系统的组成、特点及运行方式，对转速控制子系统、压缩机静叶角控制子系统、二喉道栅指控制子系统等进行了较为详细的介绍。

However, the difference decrease to 2.6% when the inflow Mach number increases to Ma 8. An analysis for flow and heat transfer between two parallel plates microchannel with one wall heated in slip flow regime

而当来流马赫数为8.09时，侧板前掠的进气道流量系数仅高2.6%。滑移流区平行平板微通道内单侧加热流动与换热