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Aerodynamic Install...
Aerodynamic Installation Effects of Over the wing Mounted Ultra high bypass Engines
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- Tavares Silva, Vinícius, 1991 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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- Lundbladh, Anders, 1964 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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- Xisto, Carlos, 1984 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Abstract
Ämnesord
Stäng
- In order to increase propulsive efficiency and decrease specific thrust, future aeroengines for commercial airliners will have to operate with higher bypass ratios and lower fan pressure ratios. This results in a substantial increase of the fan diameter. One major issue with the conventional under-wing installation of ultrahigh-bypass engines is the limited space underneath the wings. Integrating larger engines under-the-wings could require prohibitive increase in landing gear height and weight to attain an adequate ground clearance. One potential solution is to mount the engines over-the-wings, which would eliminate the ground clearance problem and, in addition, reduce ground noise. Over-wing nacelle installation acquired a bad reputation in the past since the benefits of such configuration would be often outweighed by poor aerodynamic performance. Nonetheless, some recent studies indicate that over-wing mounted nacelles could be a feasible integration option. This paper provides an aerodynamic evaluation of an over-the-wing mounted nacelle configuration compared with an under-the-wing configuration for a mid-cruise condition. The nacelles and pylons are designed by using an in-house tool for engine aircraft aerodynamic integration. The flow field is computed by means of Reynolds-averaged Navier-Stokes equations. The effects of wing/nacelle/pylon interference are investigated, and the aerodynamic performance of each configuration is evaluated by means of thrust and drag bookkeeping. Results show that the over-the-wing nacelle installation has increased the overall drag by 19.7 drag counts, when compared to a conventional under-wing mount, which was caused mainly due to a higher wing wave drag and pylon/nacelle interference drag.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- propulsion integration
- nacelle
- aerodynamics
- ultra-high bypass ratio
- computational fluid dynamics
- Over-the-wing nacelle installation
Publikations- och innehållstyp
- vet (ämneskategori)
- kon (ämneskategori)