Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Ground Effects"”.
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Jet/Wall Interaction: An Experimental Study with Applications to VSTOL Aircraft Ground Effects
The flow field of a twin jet impinging on ground plane with and without free-stream and at low jet-height-to-diameter ratios was investigated using the Particle Image Velocimetry (PIV) technique. Detailed, time-averaged flow field data are obtained via the high-resolution and the high-sampling rate …
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Numerical simulation of feedback control of aerodynamic configurations in steady and unsteady ground effects
… coupled lifting surfaces in steady and unsteady ground effects was developed. This model was coupled with the equations of motion to simulate aerodynamic-dynamic interaction. The resulting model was then coupled with a feedback-control law to form a general nonlinear unsteady numerical simulation …
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Modeling of Rotor Wake Vortex Dynamics and Interactions in Non-Homogenous Vertiport Environments
… current research serves to analyze and study the effects ground forces can have on the thrust performance of a propeller in multiple different configurations. The current research utilizes an open source Computational Fluid Dynamics (CFD) software known as OpenFOAM to generate calculate and …
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Noise propagation model for the design of weather specific noise abatement procedures
… algorithm that incorporates atmospheric and ground effects. The simulator uses standard weather profiles, terminal aircraft radar data and flight simulator data as input. NOISIM allows users to explore a wide array of flight procedures and weather conditions to determine the flight procedure …
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Modeling Of Atmospheric Refraction Effects On Traffic Noise Propagation
Traffic noise has been shown to have negative effects on exposed persons in the communities along highways. Noise from transportation systems is considered a nuisance in the U.S. and the government agencies require a determination of noise impacts for federally funded projects. There are several …
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Concept Study of a High-Speed, Vertical Take-Off and Landing Aircraft
… that the DiscRotor will perform well in hover. Ground Effects in hover were examined by simulating the ground with a movable, solid wall. The thrust was found to increase by 50% compared to the ground-independent case. Pressure distributions were measured on the ground and disc surfaces. …
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Macro to Micro Legacies of Landuse at the Calhoun Critical Zone Observatory
… to accurately and effectively study the belowground dynamics of these forests and other landuse histories of interest. One of the analytical tools necessary for this was the development of effective and reliable Field-Portable Gas Analysis tools (FPGA). FPGAs have been developed at the Calhoun …