Özet:

In this paper, on design analysis of high bypass turbofan engines with separate flow and no afterburning used in commercial aircraft was analysed and then effects of some design variables (e.g. compressor pressure ratio, fan pressure ratio ,turbine inlet temperature, bypass ratio, cooling air ratio, nozzles pressure losses) and effects of different flight conditions (e.g. flight altitude and flight Mach number) on the engine performance were investigated. A new software program had been developed for this purpose in Visual Basic 6.0 programming language. Values of the engine performance parameters such as specific fuel consumption and specific thrust were calculated and then performance curves were obtained in this software program.

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