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A 5-seat hot tub with a cast acrylic shell, supported by a frame structure, showing vents for water circulation and massage Outdoor hot tubs. A hot tub is a large tub full of water used for hydrotherapy, relaxation or pleasure. Some have powerful jets for massage purposes. Hot tubs are sometimes also known as "spas" or by the trade name Jacuzzi ...
On supersonic jets, the high kinetic energy in the approaching air has to be transformed into static pressure while losing a minimum amount of energy. To do this the inlets are more complicated than subsonic ones as they have to set up two or three shock waves to compress the air. A cone or inclined ramp protrudes ahead of the inlet.
A jet engine afterburner is an extended exhaust section containing extra fuel injectors. Since the jet engine upstream (i.e., before the turbine) will use little of the oxygen it ingests, additional fuel can be burned after the gas flow has left the turbines. When the afterburner is turned on, fuel is injected and igniters are fired.
The principal difference of this derivative was the replacement of the Atar engine by an Israeli-built General Electric J79 engine. The J79 was a popular American engine for combat aircraft, having already been used on fighters such as the Lockheed F-104 Starfighter and the McDonnell Douglas F-4 Phantom II .
Bleed air in aerospace engineering is compressed air taken from the compressor stage of a gas turbine, upstream of its fuel-burning sections.Automatic air supply and cabin pressure controller (ASCPC) valves bleed air from low or high stage engine compressor sections; low stage air is used during high power setting operation, and high stage air is used during descent and other low power setting ...
A pulsejet engine (or pulse jet) is a type of jet engine in which combustion occurs in pulses. A pulsejet engine can be made with few [ 1 ] or no moving parts , [ 2 ] [ 3 ] [ 4 ] and is capable of running statically (that is, it does not need to have air forced into its inlet, typically by forward motion).
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