NASA Snapped First-Ever Images of Interacting Supersonic Shock Waves
Two supersonic jet aircraft of the U.S. Air Force travelled so fast, – at speeds greater than the speed of sound -, and so close to one another that the shock waves generated from the jets began to combine… and the event was captured by NASA via an air-to-air schlieren photography technology.
First-ever snapshot of two supersonic shockwaves colliding in air (NASA)
The merging shock waves (pressure waves) were created by two T-38 supersonic airplanes flying about 9 meters from each other and at 3 meter difference in height.
The stunning images, which were captured by another plane flying at about 610 meter above the two fast-moving aircraft, are the first-ever photos of two supersonic shock waves interacting in the air.
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Supersonic shockwave created by a single T-38 aircraft (Credit: NASA Photo)
Because air molecules can’t keep up with its speed, they are subjected to compression. This leads to a rapid rise in pressure in front of the aircraft, resulting in a new type of wave: supersonic shock wave. Shock waves are not seen by human eye, instead they can be heard as a thunder-like sound called a sonic boom.
NASA captured also a photo dubbed as a “knife-edge” shot of supersonic shock waves created by a single T-38 jet. Shock waves created by a single aircraft appear like straight lines emerging like a cone off the tip of the aircraft.