查询词典 mach number

A numerical simulation was conducted for a fixed-geometry two-dimensional mixed-compression supersonic inlet with sweepforward high-light and "X" type missile configuration. The results indicate:(1) The total pressure recovery declines with the rise of the free stream Mach number, while the mass flow ratio rises firstly and then declines when its maximum value is obtained at the design point.

针对一种定几何二元倒置&X&型混压式超声速进气道开展了数值仿真研究，结果表明：随着来流马赫数的增加，进气道总压恢复系数下降，而流量系数却先上升，在设计点达到最大值后下降。

In this paper, The delta wing of Mach number 0.8 at an attack angle of 21. 8 degree is simulated by our program. Then, using the visualizing program, we map the figures of space streamlines, cross streamlines near the vortex axis, three dimensional vortex lines, cloud atlas for pressure and vortex and targer of particles.

在这一章里，我们先用所建立的计算软件数值模拟了来流马赫数为0.8、攻角为21.8°的三角翼的流场，之后以拓扑分析结果做指导，研制了一套数值显示流场、旋涡结构的软件，用该软件我们绘制了跨音速三角翼背风区涡轴附近截面流线、空间流线、三维涡量线、压力和涡量云图以及粒子屏痕图。

The basic reason for low Mach-number limitation is the requirement of small fluidvelocity to avoid the equilibrium distribution functions being negative unphysically.

格子玻耳兹曼方法只能模拟低马赫数流动的根本原因在于流体流速必须很小，否则会导致平衡分布函数变负而失去物理意义。

The Mach number approaches unity at the virial shock, where the accreted gas is heated to the virial temperature.

在维里激波处马赫数接近1，气体在此处被加热至维里温度。

During high-speed flight only the advancing blades of each rotor generated lift; this off-loaded the retreating blades and thereby eliminated the aerodynamic restrictions caused by blade-stall and the high mach number effect of the advancing blade tip.

在高速飞行只有每个转子叶片产生升力推进，这卸下撤退的刀片，从而消除了刀片失速和高马赫数前进叶尖数效应所造成的空气动力的限制。

In the paper, the resistance heated and continuous facility is adopted to finish scramjet combustor experiment research on hydrogen-fueled and ethylene-fueled ignition and combustion at different equivalence ratio. The continuous clean airflow of flow ratio 0.73kg/s, total temperature Tt=1000K, Mach number M=2.0, total pressure Pt=0.8MPa is available to the inlet of direct-connected experimental model.

本文采用电阻加热的连续式实验设备，在燃烧室进口气流为高温纯净空气、Ma数M=2、总温Tt=1000K，总压Pt=0.8MPa条件下，进行了不同当量油气比的氢和乙烯燃料的超音速燃烧室直连式实验。

Based on similarity Principles and some typical operating mechanisms of combustion engines, the present paper suggests the modeling rules of steady performances of combustors at low flow mach number.

本文是以燃烧过程的动力机理和燃烧系统的相似理论为基础，结合发动机的几种典型燃烧情况来研究低速燃烧系统稳态工况的模化法则。

With barriers, explosion wave changes greatly and quickly, and a sudden change of explosion wave and the phenomenon of Mach number M≥1 are possibly resulted in, i.e.

原因是障碍物的存在加剧了火焰传播过程中的湍流现象，而湍流又加速了火焰传播。

Therefore,a high outlet mach number cangeneratea frequency that will match the valve/pipe systemresonancefrequency and this will lead tovibration.

因此，高的阀门出口马赫数将能够产生一个与管道系统频率相配合的频率，这将导致发生共振。

Moving load ; Mach number ; ground vibration ; finite element method ; thin layer element

移动荷载；马赫数；地基振动；有限元方法；薄层单元

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。