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- W4206275914 abstract "Active load alleviation can substantially contribute to reduce the structural weight and emissions of future transport aircraft. Fluidic actuators, as part of active load alleviation systems, have the potential for faster and more complete gust load reduction. The performance of a dual slot Coandă-type fluidic actuator for gust load alleviation is investigated experimentally on a supercritical airfoil model. The tests are conducted in a low-speed wind tunnel at a chord-based Reynolds number of Re=1.5·10^6 and Ma=0.14. The model features an elliptical Coandă geometry integrated into the airfoil’s trailing edge to minimize cruise performancepenalty, while still allowing for substantial load reduction. Blowing from a single slot, as well as simultaneously from pressure and suction side slots is tested over a range of blowing rates, angles of attack and blowing ratios to assess the impact on both load alleviation and baseline performance recovery. Both steady and impulsive activation performance are evaluated basedon surface pressure, integral load, and flow field measurements around the Coandă geometry. High control authority is found for upper and lower single slot blowing, with peak changes in lift coefficient of about ±0.33 and lift-to-equivalent-drag ratios of up to 100. Similar peak lift changes and reduced equivalent drag are obtained by adding marginal (<14 %of total) blowing from the opposite slot, which also reduces pitching moment changes for primary upper and marginal lower blowing. Impulsive jet activation exhibits load control authority comparable to steady actuation and sufficiently short onset times to compensate all gusts defined by certification documentation. The obtained results serve to validate numerical simulations and support the actuator’s applicability for active load alleviation on future aircraft." @default.
- W4206275914 created "2022-01-26" @default.
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- W4206275914 date "2022-01-03" @default.
- W4206275914 modified "2023-10-18" @default.
- W4206275914 title "Experimental Characterization of a Dual-Slot Coandă Actuator for Load Reduction" @default.
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- W4206275914 doi "https://doi.org/10.2514/6.2022-0688" @default.
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