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Showing 1 to 7 of 7 for “"Natural Laminar Flow"”.
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High lift configuration of a slotted natural laminar flow airfoil
Experiments were performed on a slotted natural laminar flow airfoil, the S414. The slotted natural laminar flow airfoil concept was developed to satisfy design constraints of high maximum lift and low profile drag. A two-element natural laminar flow configuration allows the typical rapid …
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Investigating the impact of coupled high-lift devices on natural laminar flow airfoils
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Open-loop and closed-loop trailing-edge separation control on a natural laminar flow airfoil
Active Unsteady Flow Control experiments were performed on a Natural Laminar Flow, NLF 0414 airfoil at Re = 1.0 × 10(6) in a 3-ft × 4-ft low-speed, low-turbulence wind tunnel. The NLF 0414 was designed with a region of favorable pressure gradient extending almost 70% of the chord on the upper …
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Three-Bladed Propeller Design for the Reduction of General Aviation Radiated Noise Characteristics
… conventional, as well as specifically designed natural-laminar-flow (NLF) airfoils, 3-bladed propeller designs resulted in predicted noise reductions of 3.4 dB in the near-field which corresponds to 5.1 dBA; and a 3.4 dB (7.0 dBA) in the far-field when compared to the 2-bladed propeller. These …
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Multidisciplinary Design Optimization and Industry Review of a 2010 Strut-Braced Wing Transonic Transport
… the wing to unsweep for increased areas of natural laminar flow and further structural weight savings. High aerodynamic efficiency translates into reduced fuel consumption and smaller, quieter, less expensive engines with lower noise pollution. A Multidisciplinary Design Optimization (MDO) …
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Multidisciplinary Design Optimization of a Strut-Braced Wing Aircraft
… a larger percentage of the wing area to achieve natural laminar flow. Additionally, tip-mounted engines can be used to reduce the induced drag. The MDO approach helps the designer achieve the best technology integration by making optimum trades between competing physical effects in the design …
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Investigating the frequency behavior of fluidic oscillators and their application as active flow control for an SNLF airfoil
… airfoil with an open slot to promote a laminar boundary layer across the entire fore element and large portions of the aft element. Active unsteady flow control using embedded fluidic oscillators was identified as a potential source to improve the flow field and maximize the lift of a …