Turbofan performance assessment: A new method of analysis and presentation

At the project design stage, conventional methods of turbofan performance analysis involve lengthy and time consuming computer calculations leading to extensive graphical representation. An alternative method of analysis is described, introducing a dimensionless form for both thaist and specific fuel consumption. Each of the latter parameters are found to vary linearly with a new parameter, the In-pass Ratio, over a wide range of typical engine parameters. The proposed method is shown to facilitate, with little loss of accuracy, considerable savings in both computer time and graphical presentation when compared with exact methods. Starting in 1946 as the College of Aeronautics, the Cranfield Institute of Technology was granted university status in 1969. In 1993 it changed its name to Cranfield University.