Local Mach number - Local Mach number

Japanese: 局所マッハ数 - きょくしょまっはすう
Local Mach number - Local Mach number

…Therefore, the Mach number obtained by dividing the speed at a certain point in the flow by the speed of sound at that point varies with location. The Mach number defined in this way is called the local Mach number. In contrast, the Mach number far upstream of the blade is called the mainstream Mach number, or the uniform flow Mach number. …

*Some of the terminology that refers to "local Mach number" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…したがって,流れの中のある点の速度をその点の音速で割って得られるマッハ数は,場所によって変わる。このようにして定義されるマッハ数を局所マッハ数と呼ぶ。これに対して翼のずっと上流におけるマッハ数を主流のマッハ数,あるいは一様流のマッハ数と呼ぶ。…

※「局所マッハ数」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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