Compresses Raise the Pressure of Air Going in to Gas Turbine

Compresses Raise the Pressure of Air Going Points : Compresses Raise the Pressure of Air Going In To Gas Turbine It is a characteristic of compressor that how it raise the pressure of air going in to gas turbine. For briefly describing this. het we consider that, when a valve, placed in the delivery line of a compressor running at constant speed, is slowly opened. The variation in pressure ratio is shown in fig. When the valve is shut and the mass flow is zero, the pressure ratio will have some valve A, corresponding to the centrifugal pressure head produced by the action of the impeller on the air trapped between the varies. As the valve is opened and flow commences the diffuser begins to contribute its quota of pressure rise and the pressure ratio increases. At some point B, where the efficiency approaches its maximum valve the pressure ratio will reach a maximum, and any further increase in mass flow will result in a fall of pressure ratio.