A. Drive the compressor.
B. compress the air
C. increase the velocity of the exhaust gases
D. reduce the temperature of the exhaust gas
2006-10-31 02:57:24 · 3 answers · asked by BrandyWhite 1 in Science & Mathematics ➔ Engineering
b
2006-10-31 02:59:47 · answer #1 · answered by David B 6 · 0⤊ 0⤋
Hot gases leaving the combustor are allowed to expand through the turbine. In the first stage the turbine is largely an impulse turbine (similar to a pelton wheel) and rotates because of the impact of the hot gas stream. Later stages are convergent ducts that accelerate the gas rearward and gain energy from that process. Pressure drops, and energy is transferred into the shaft. The turbine's rotational energy is used primarily to drive the compressor. Some shaft power is extracted to drive accessories, like fuel, oil, and hydraulic pumps. Because of its significantly higher entry temperature, the turbine pressure ratio is much lower than that of the compressor. In a turbojet almost two thirds of all the power generated by burning fuel is used by the compressor to compress the air for the engine.
2006-10-31 03:05:34 · answer #2 · answered by DanE 7 · 0⤊ 0⤋
A
Doug
2006-10-31 03:00:00 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋