Academic Journal
Aerodynamic testing of pulsed-jet actuation on a short-inlet UHBR engine nacelle.
| Τίτλος: | Aerodynamic testing of pulsed-jet actuation on a short-inlet UHBR engine nacelle. |
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| Συγγραφείς: | Hayböck, Stefan1 (AUTHOR) stefan.hayboeck@tum.de, Breitsamter, Christian1 (AUTHOR) christian.breitsamter@tum.de |
| Πηγή: | Experiments in Fluids. Sep2026, Vol. 67 Issue 9, p1-22. 22p. |
| Θεματικοί όροι: | *Wind tunnel testing, *Flow separation, *Turbofan engines, *Aerodynamic measurements |
| Περίληψη: | Innovative short-inlet nacelle designs and disruptive technologies are essential for minimizing the drag and weight penalties of high-bypass-ratio turbofan engines. Active flow control (AFC) can mitigate inlet separation under off-design conditions by using local air injection at the inlet lip. This work investigates wind tunnel testing of continuous and pulsed blowing on a generic short-inlet UHBR nacelle at high angles of incidence (AoIs). The model is designed as a flow-through nacelle and is tested at a free stream Mach number of 0.15. The Reynolds number associated with the nacelle length is 2.4 × 10 6 . Static pressure tabs on the model surface and a traversable total pressure rake serve to evaluate the performance of AFC. Both continuous and pulsed blowing could prevent inlet separation for AoIs of 18 ∘ and 22 ∘ , reducing spatial total pressure non-uniformity by up to 80%. Here, the AFC performance showed strong sensitivity to the jet velocity. A comparison of required momentum revealed that pulsed blowing consumes 20% less momentum input than continuous blowing for the same improvement level. For an AoI of 26 ∘ , only continuous blowing at maximum momentum input could effectively mitigate inlet separation. This experimental study confirms the potential of AFC to improve inlet flow under off-design conditions. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
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