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Showing 1 to 4 of 4 for “"powered lift"”.
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Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration
… typical results show a relationship between lift coefficient, CL, vs blowing momentum coefficient, Cμ. CFD analysis tend to over-predict values of CL due to gridding issues and/or turbulence model selection. This thesis attempted to address both issues by performing Richardson’s Extrpolation …
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A Conceptual Design Methodology for Predicting the Aerodynamics of Upper Surface Blowing on Airfoils and Wings
One of the most promising powered-lift concepts is Upper Surface Blowing (USB), where the engines are placed above the wing and the engine exhaust jet becomes attached to the upper surface. The jet thrust can then be vectored by use of the trailing edge curvature since the jet flow tends to remain …
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Aero-propulsive characteristics of an overwing distributed electric propulsion system with vectored thrust
… force due to an increase in circulation-based lift and direct thrust force. At low thrust deflection angles, increases in stream-normal forces were also observed, alongside significant amounts of forward thrust, with an increased fan tip speed ratio. At a given nozzle deflection angle and fan …
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Jet/Wall Interaction: An Experimental Study with Applications to VSTOL Aircraft Ground Effects
… initiate the take-off operation due to the high lift loss encountered while the airframe is in proximity to the ground. Therefore, jet-height-to-diameter ratios of 2 and 4 were employed in this study. Jet-to-free-stream velocity ratios of 0.12, 0.18 and 0.22 were employed in addition to the …