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加加林少校在談到他乘“东方号”宇宙飞船返航时,曾經說:“……当飞船进入大气层后,直看到飞船外壳燃起了熊熊的火焰……。”奇怪,为什么这个时候飞船表面会燒起来呢?說起来这个道理也很簡单,大家知道,宇宙飞船的速度是很快的,它至少要比最快的汽車快五百倍,比最快的飞机要快三十倍,所以,当飞船进入大气层后,船壳就和空气发生高速度的磨擦,由于磨擦,飞船外壳就发热了。不能低估这个磨擦热,它能使飞船表面溫度升得很高,一般估計可能达到摄氏六千度。可以
When Major Gagarin talked about his return to the spacecraft “Vostok”, he once said: “When the spacecraft enters the atmosphere, it looks straight at the shell of the spacecraft and ignites the blazing flame....” It’s strange why this time The reason why the surface of the spacecraft will be burned up is very simple. Everyone knows that the speed of the spacecraft is very fast. It is at least 500 times faster than the fastest car and 30 times faster than the fastest aircraft. Times, so when the spacecraft enters the atmosphere, the hull rubs against the air at a high speed, and the shell of the spacecraft heats up due to friction. The frictional heat cannot be underestimated. It can raise the surface temperature of the spacecraft very high. It is generally estimated that it may reach 6,000 degrees Celsius. can