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Breaking the sound barrier. PHOTOS
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 17 Jul 2012

Breaking the sound barrier. PHOTOS

 







The pilots of supersonic aircraft knows everything about the sound barrier. When a plane speed changes to supersonic, the plane receives aerodynamic shock.

When flying at transonic speeds in conditions of high humidity, the plane creates a cloud behind it, this is the so-called, the effect of the Prandtl - Gloert. When it happens at very high humidity, this effect may occur at low speeds.

The emergence of this effect is due to the fact that flying at high speed jet creates a region of high pressure air in front of him and the area of low pressure behind. When the plane is flying, a low pressure area begins to fill the surrounding air. By virtue of the relatively high inertia of the air mass at first the whole area is filled with low pressure air from the surrounding areas adjacent to areas of low pressure.

Such process named as adiabatic, it makes the air volume to increase, and its temperature decreases. If the humidity is high enough, the temperature can drop to a value that is below the dew point. Then, the air contained in water vapor condenses into tiny droplets that form a small cloud.
















































































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