| Change log entry 65632 | |
|---|---|
| Processed by: | goldyn_chyld (2018-06-03 17:48:10 UTC) |
| Comment: |
<< review queue entry 62305 - submitted by 'richwarm' >> 1) 馬赫 A couple of problems with the definition: - It's not "1 Mach, 2 Mach, ...". It's "Mach 1, Mach 2, ..." - It's not a "unit of speed". Wp ~ "As the Mach number is a dimensionless quantity rather than a unit of measure, with Mach, the number comes after the unit; the second Mach number is Mach 2 instead of 2 Mach (or Machs).": 2) 馬赫數 Three problems with the definition: - It could be a multiple, but not "multiples" (plural). However, it could also be a *fraction* of the speed of sound. - It's a concept of fluid dynamics rather than specifically aeronautics. - "1224 km per hr" -- that figure will depend on the fluid. 流体力学中表征流体可压缩程度的一个重要的无量纲参数，记为Ma，定义为流场中某点的速度v同该点的当地声速c之比，即Ma=v/c，它是以奥地利科学家E.马赫的姓氏命名的。 https://baike.baidu.com/item/%E9%A9%AC%E8%B5%AB%E6%95%B0 Mach number, in fluid mechanics, ratio of the velocity of a fluid to the velocity of sound in that fluid https://www.britannica.com/science/Mach-number |
| Diff: |
- 馬赫 马赫 [Ma3 he4] /Mach (name)/Ernst Mach (1838-1916), German physicist/Mach (aeronautics), unit of speed based on speed of sound = 1 Mach = 1224 km per hr/ + 馬赫 马赫 [Ma3 he4] /Mach (name)/Ernst Mach (1838-1916), German physicist/Mach number (fluid mechanics)/ - 馬赫數 马赫数 [Ma3 he4 shu4] /Mach number, multiples of speed of sound used as unit in aeronautics, with 1 Mach = 1224 km per hr/ + 馬赫數 马赫数 [Ma3 he4 shu4] /Mach number (fluid mechanics)/ |