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汉语拼音：mǎ hè shù

飞机、火箭等在空气中移动的速度与声速的比。因奥地利物理学家马赫（Ernst Mach）首先提出而得名。

• By numerical simulation, the optimal value of the plenum chamber height, the ejector slot height and the wall porosity have been found.

  计算结果表明，不同的驻室高度和引射缝高度对实验段马赫数分布有很大影响；

• However, for some types the AFM notes a correction that must be made to the Indicated Mach to provide the True Mach.

  然而，一些航空器上的飞行管理计算机自动将指示马赫数修正为真马赫数。

• Jet control parameters include: Mach number at jet exit, the total temperature and diameter of nozzle.

  喷流控制参数主要包括喷流出口马赫数、喷流总温、喷口直径。

• 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。

• with high temperature and high pressure in nozzle of wind tunnel , the effect of variable specific heat on nozzle design must be considered.

  本文针对超音速、高超音速喷管内马赫数、温度变化剧烈的特点，研究了比热容变化对设计喷管型面产生的影响。

• The critical Mach number is influenced by the initial pressure and temperature, but the temperature is the main factor.

  可燃气体初始温度和压力对起爆临界马赫数都有影响，但是初始温度的影响大得多。

• For the further supersonic range, performance losses increase slightly with increasing Mach number.

  在继续的超声速范围内，性能损失随外流马赫数增加只有小幅增长。

• The method can be used in Mach number constant flight flutter test and flight envelope expansion.

  该方法适用于固定马赫数的飞行颤振试验和飞行包线扩展。

• The results indicate that the inlet Mach number and the diameter of projectile's ball head are important factors of aerodynamic heating.

  计算结果表明：来流马赫数、头部球头的直径等是影响气动热的重要因素。