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The exhaust thrust from a jet engine is equal to exhaust mass flow times exhaust velocity, i.e., Thrust = ṁv, while the energy to make that thrust is given by Energy = 1/2mv 2. A mixer helps reduce the fastest exhaust velocities from the core of the engine, while making the average exhaust velocity faster, producing more thrust with the same ...
On civil turbofans, the first stage of the LP compressor is often a single-stage fan. If the HP compressor pressure ratio exceeds about 4.5:1, then the unit will probably have variable geometry (i.e. variable stators) on the first few stages, to make the surge line on the compressor map more shallow, to accommodate the shallow working line.
The exit area is sized to pass the specific volume at the design condition. [1] Second, all the rotor and stator blades in an axial compressor, and impeller inducer and diffuser vanes in a centrifugal compressor, [2] [3] are angled to meet approaching air head-on at the design condition to minimize incidence losses. Incidence losses reduce the ...
A pressure wave supercharger (also known as a wave rotor [1]) is a type of supercharger technology that harnesses the pressure waves produced by an internal combustion engine exhaust gas pulses to compress the intake air. Its automotive use is not widespread; the most widely used example is the Comprex, developed by Brown Boveri. [2] [3] [4]
By December 31, 1999, all Stage 2 noise jetliners 75,000 pounds or more operating in the US must have Stage 3 hush kits in order to continue to fly in the US after January 1, 2000. This regulation threatened to reduce the value of the mostly-American used airplanes that employed hush kits and hurt the profits of American hush kit manufacturers ...
The 340 and 375 kW (462 and 510 PS; 456 and 503 hp) versions were introduced in Mercedes-AMG GT (C190). The power has been upgraded several times. Brabus offers PowerXtra B40S-800, a performance upgrade kit for AMG GT. [12] The kit increases the output to 588 kW (799 PS; 789 hp) at 6,500 rpm and 1,000 N⋅m (738 lb⋅ft) at 1,750-4,500 rpm.
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