…Gases are highly compressible, so when they flow around objects or through pipes of varying cross-sectional area, the compressibility of the gas affects the flow. This effect is not significant as long as the flow speed is smaller than the speed of sound, but as the flow speed approaches the speed of sound, the effect becomes significant, and at speeds greater than the speed of sound, the flow conditions change completely. … *Some of the terminology that refers to "compressibility" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…気体は圧縮性が大きいので,気体が物体のまわりを流れたり,断面積の変化する管の中を流れたりする場合は,圧縮性が流れの状態に影響を与える。この影響は流れの速度が音速に比べて小さい間はたいしたこともないが,流れの速度が音速に近くなるに従ってその影響は著しくなり,音速以上の速度になると流れの状態はまったく変わってしまう。… ※「圧縮性」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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