A long thin tube that has varying section within it is an expansion hose. These parts are meant to create very high-speed moving air. This expands over time, the scientists can use this expansion tube to study things like airplanes that fly super fast and even how rockets go into space. It's like the world's longest-running science experiment in how things fly!
For example, when a plane flies any faster than this and creates a loud boom sound known as ‘sonic boom' –it is literally breaking the barrier ( of ). Sound is produced when the plane flies faster than the speed of sound. Scientists can simulate such a situation in the expansion tube. They are eager to understand what else can be done with the jets, how they might go faster without that pesky loud boom. This they explain, fosters an environment of silent skies that everyone can enjoy.
Expansion tubes are also useful for studying the aerodynamics of various objects in motion. Aerodynamics, or the study of how things move in gases and liquids,is what makes airplanes fly high, rockets launch to space,and some race cars go faster than 200 miles per hour. This insight is something engineers need to make more optimal designs.
The rubber expansion bellows allows scientists to alter the airflow path and observe how various structures respond, or fail. This allows them to develop better vehicles that can go faster and use less of the precious energy they strive so hard to harvest. If, for example, they want to create a new airplane that's more efficient then they can predict how its shape will impact on its speed and the amount of fuel it uses.
One way they accomplish this is by firing objects through expansion tubes at the speed of sound. This allows them to determine what they must do in order for airplanes or rockets are able to cope with these speeds and not get too hot or fall apart. Knowing these conditions are important for the future of travel, and also if we want to spread outside our universe.
They pump a gas, like helium (although he would not confirm the exact nature of that gas) into one end and compress it with a piston. The gas, right as it is released; rapidly expands in all directions to create a shock wave. Such a shock wave would travel through the tube to collide with a stopped wall -- resulting in an extremely hot and high-pressure region known as "test gas. "
From there, scientists can use this test gas to observe behaviors of various objects at high velocities or in different atmospheric conditions. Laser or camera images (ex: a photo of the shock wave and photo with test gas) This provides them with information that can be used in the design of new vehicles and understanding physics better how they work at high velocities.
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