Colloquium: Lars Velthausz (FPP)

25 augustus 2022 10:00 - Locatie: LECTURE ROOM B, FACULTY OF AEROSPACE ENGINEERING, KLUYVERWEG 1, DELFT | Zet in mijn agenda

Feasibility of an Engine Architecture using Bypass Cooled Cooling Air

This study analyses the feasibility of an engine architecture using bypass cooled cooling air as a method for reducing specific fuel consumption (SFC) on turbofan engines. As Cooled cooling air reduces required turbine cooling massflow, a major source of loss in aeroengines, it is believed that the concept can improve engine efficiency. No explicit study on the merits of this concept has been performed however.

A parametric analysis was performed, using GSP, evaluating the impact of the concept on performance. In all cases an SFC increase was observed; +1.5% SFC for the first 100K cooling temperature decrease.

It is concluded that as a method for reducing fuel consumption cooled cooling air with the bypass as a heat sink is not feasible even with extreme design parameters (high OPR, BPR). Heat rejected to the bypass cannot be effectively utilised and the improvement in core efficiency from reduced cooling air cannot compensate.

Supervisor: Prof. Piero Colonna

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