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在超音速飞行中,飞机表面边界层内的空气温度由于摩擦升高很多,高温空气的热能传给飞机,使飞机表面温度昇高,称为气动加热。飞机表面各处空气的速度不同,由此而产生的表面温度分布也不均匀,飞机表面和内部结构之间则有更大的温差。飞机表面受到气动加热后要产生膨胀,而内部结构的温度较低,刚度又较大(和表面结构相比较而言),对飞机表面结构起了限制膨胀的作用。所以表面结构受到压应力,内部结构的一
In supersonic flight, the temperature of the air in the boundary layer of the plane is greatly increased due to friction. The heat energy of the high-temperature air is transmitted to the aircraft so that the surface temperature of the aircraft increases, which is called aerodynamic heating. The speed of the air varies across the surface of the aircraft, resulting in an uneven surface temperature distribution and a greater temperature difference between the aircraft surface and the internal structure. The surface of the aircraft is aerodynamically heated to produce expansion, while the internal structure of the lower temperature, stiffness and larger (compared with the surface structure), the aircraft surface structure has played a limiting expansion. So the surface structure is subject to compressive stress, one of the internal structures