低马赫数亚声速外流时，性能损失随外流马赫数的增加成近似线性增加；

For subsonic free stream, performance losses almost linearly increase with increasing <em>Mach</em> <em>number</em>.

本文还提出了一种确定不起动马赫数的方法。

The method for the unstart <em>Mach</em> <em>number</em> is described.

高对流马赫数混合层中存在较弱的小激波间断.

There are shock lets in the mixing layer with convective <em>Mach</em> <em>number</em> 1.2.

分离点的位置随着攻角和马赫数的变化而变化。

The frequency of vortex shedding and the position of separation are affected by the incidence and <em>Mach</em> <em>number</em>.

讨论了翼偏角、攻角、马赫数和单位雷诺数对热流与压力特性的影响。

Effects of flap deflection angle, angle of attack, <em>Mach</em> <em>number</em> and unit Reynolds number are discussed.

在一个稳定的内部流动马赫数只能达到一在最低限度，在截面积。

In a steady internal flow the <em>Mach</em> <em>number</em> can only reach 1 at a minimum in the cross-sectional area.

通过计算可以得出密度 、 速度 、 温度 、 压力和马赫数的分布.

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

且不同模态下出口马赫数对非定常流动的影响规律表现不尽相同。

Moreover, the law governing the influence of the outlet <em>Mach</em> <em>number</em> on the unsteady flow under various modes is found to be not always identical.

对于过热蒸汽或干净的气体，阀门的出口马赫数推荐在连续操作情况下低于0.4，间歇操作时候低于0.5。

For superheated steam and clean gas, a valve outlet <em>mach</em> <em>number</em> below 0.4 is recommended for continuous operation and below 0.5 for intermittent operation.

冲压式喷射发动机在马赫数为2（音速的两倍）或更高时工作得最好。

Ramjets work best at speeds of Mach 2 (twice the speed of sound) and higher.