Generating Performance Curve of a turbine

[Rahul Mohan P]

Hi
I have data for a two wheel bootstarp air cycle machine used in aircraft environmental control system for air-conditioning under working conditions. The data available (ie mass flow rate, pressure, temperature of bleed air) is for different flight conditions, different altitudes, different temperature and pressure. I want generate corrected mass flow rate vs pressure ratio curve of the turbine used in the system. I don't have the standard data noted at STP (standard pressure and temperature) conditions, and no manufacture provided performance curve, but can I generate a curve using the available values which is not taken under STP conditions. Please Help.

 

[Illmatic1]

Yes, it is possible to generate a corrected mass flow rate vs pressure ratio curve for the turbine using the available values that are not taken under STP conditions. This can be done by using a pressure ratio and temperature correction factor to convert the available data from the non-STP conditions to the STP conditions. The pressure ratio correction factor is calculated using the ideal gas law, while the temperature correction factor is calculated using the specific heat capacity of air. Once these correction factors are applied, the corrected mass flow rate vs pressure ratio curve can be generated from the corrected data.