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Q:

What is the static and dynamic pressure at the inlet of a gas turbine fan. And what will happen to the two as air passes through the fan?

A:

The pressure exerted on any part of the airplane depends on how the air is moving around the airplane. Static pressure is the pressure that would be exerted if the air isn't moving or if the airplane is moving with the exact same speed as the air. In this case, air presses equally on all parts of the airplane. This pressure decreases as speed because increases of conservation law. This means that if the fan in the turbine of a jet engine is speeding up the air, then the static pressure would decrease. Dynamic pressure is the pressure exerted by the air because of its motion. If the turbine speeds up the air, then the dynamic pressure of the air would increase. In flight pilots are constantly measuring both of these pressures in order to determine how fast they should fly their airplane.

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Categories: Aerodynamics