Mixer and Nozzle Process Description :: essays research papers

MixerThe hot p arentage that is forced emerge(p) of the combustor and through the turbine continues to exit the engine at the rearward. Before exiting however, this air mustiness be mixed with the cooler bypass air that did not go through the compressor and combustor. These twain airstreams are mixed in order to unagitated the engine.To understand how air can create noise, first consider the representation water splashes and makes noise when a wave crashes. In the same way, when two different air streams traveling at extremely high speeds and at different temperatures collide with one another, noise is produced. In addition to the air streams colliding, the air also collides with the components of the engine and nacelle. Another example of air reservation noise is when convolute hits a house. Even in a wind storm with small wind speeds, wind makes rushing and a murmuring noise against the outside walls of a house.In order to mix the two air streams, the sociable directs t he air escaping from the combustor and turbine blades outward towards the stream of bypass air. This is gracious by stators, or channels that direct the air f small(a). There are stators in several other places in the engine, but their function is to suss out the rotational momentum of the air and force it to fly straighter. After having rancid the turbine blades, the air is given a spiraling motion which decreases its velocity. The stators correct this by channeling the air towards the nozzle so that it can be expelled as exhaust.The mixer must fend temperatures of more than 3000 degrees Fahrenheit. It is made of nickel alloys which are engineered to withstand heat. Without this heat resistance, the mixer would either melt or suffer distortions and immutable damage.Although the mixer helps to reduce jet engine noise, it does not eliminate it entirely. The low grumbling sound of a jet is the result of the air alloy inside the engine and being expelled toward the rear of the ai rcraft. The air streams coming out of the rear of the engine also slap against the air outside the aircraft and charge against parts of the aircraft itself.NozzleThe main function of the nozzle is to create thrust. As the hot gases are expelled out the nozzle, they exert a force on the plane and propel it forward. Gas turbine engines operate according to Newtons Third Law of Physics which states that for every action there is an paired and equal reaction.