www.ijeit.misuratau.edu.ly ISSN 2410- Paper ID: EN A Comparison Study For the Performance of the Mixed and Unmixed Flow Two Spool Turbofan Engines at Variable Parameters

Abstract

The following paper is to investigate the influence of some operational and design parameters on the performance of a turbofan engine with two spools and for mixed and unmixed flow. Because there are many influential variables on the performance, here a computer program with VISUAL BASIC has been developed to carry out this study. The input variables taken in consideration are the flight speed, compressor pressure ratio, fan pressure ratio, the altitude and the combustion temperature. The output obtained at these variables, which are the thrust specific fuel consumption, specific thrust, propulsive efficiency and thermal efficiency are depicted and discussed for the two types of flow.
The results show that there is a great influence of these variables on the performance parameters.