Design of a new test rig to investigate transonic external fan cowl separation
Date
2022-03-28
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Association Aeronautique Astronautique de France
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Conference paper
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Citation
Sabnis K, Boscagli L, Swarthout A, et al., (2022) Design of a new test rig to investigate transonic external fan cowl separation. In: 56th 3AF International Conference on Applied Aerodynamics, 28-30 March 2022, Toulouse, France
Abstract
Ultra high-bypass ratio engines, which show considerable promise in reducing the environmental impact of commercial aviation, generally adopt slim fan cowl profiles. These geometries can be more sensitive to separation on the external surfaces in engine windmilling conditions during take-off climb out or during cruise. This paper describes the development of a two-dimensional wind tunnel rig which can accurately replicate the separation mechanisms experienced by real aero-engine nacelles. This design process highlights the importance of considering factors such as Reynolds-number effects, tunnel-wall effects, the two-dimensional nature of the rig, and the tunnel boundary layers.
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Attribution 4.0 International