...For this reason, while there is no major problem with making the aircraft out of aluminum alloys for the Concorde, which flies at M 2, aircraft flying at M 3 or higher must use special materials such as heat-resistant titanium alloys (aircraft materials). This temperature rise caused by aerodynamic heating is an obstacle to increasing the speed of an aircraft, and is sometimes called a heat barrier. On the other hand, in the case of spacecraft, the speed at which they re-enter the atmosphere is very high; for example, the Apollo spacecraft re-entered the atmosphere at M 37, and its front surface reached 5,000 to 6,000 degrees Celsius. ... *Some of the terminology that refers to "heat barrier" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このため,M2で飛行するコンコルドでは,機体をアルミニウム合金で作っても大きな問題はないが,M3以上で飛ぶ飛行機では耐熱性のあるチタン合金などの特殊な材料を用いなければならない(航空機材料)。このように空力加熱による温度上昇は,飛行機の速度向上に対する障害であることから,熱の壁heat barrierということがある。一方,宇宙船の場合,大気圏に再突入する際の速度は非常に大きく,例えばアポロ宇宙船はM37で大気圏に再突入したので,その前面は5000~6000℃にもなった。… ※「heat barrier」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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