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.
Results
Showing 1 to 7 of 7 for “"circulation distribution"”.
-
Turbulent flowfield downstream of a perpendicular airfoil--vortex interaction
… the airfoil in response to the angle of attack distribution induced by the vortex resulting in an unstable circulation distribution according to Rayleigh's criterion. Simple theoretical models adequately describe the shed vorticity distribution of the airfoil and the unstable circulation …
-
Numerically-based ducted propeller design using vortex lattice lifting line theory
… Two routines for determining the optimum circulation distribution were considered, and a method based on calculus of variations was selected. The results of this model were compared with the MIT Propeller Lifting Line Program (PLL) output for the purpose of validation. Ducted propellers …
-
A fully numerical lifting line method for the design of heavily loaded marine propellers with rake and skew
… lifting line model is used to obtain the optimum circulation distribution along the propeller's blade via variational method, presented by Coney [9]. In this context, two approaches to the representation of the wake field are compared: the first approach utilizes Betz's condition for moderately …
-
Experimental Determination of Lift and Lift Distributions for Wings In Formation Flight
… trailing vortex strengths, total lift, and lift distributions for three-dimensional wings in close proximity flight were developed. With these experiments we model compound aircraft flight either docked tip-to-tip, or flying in formation. There is a distinct lack of experimental formation flight …
-
Modeling of Nonlinear Unsteady Aerodynamics, Dynamics and Fluid Structure Interactions
… simulated numerically while the wake and bound circulation distribution and, consequently, the associated pressure distribution are determined analytically. The steady and unsteady behaviors of the developed model are validated against experimental and computational results. The model is then …
-
Rotor Wakes; Formations, Interactions, and Design
… cores was used to estimate the concentrated circulation strength produced by each propulsive device. It was found that compared to the baseline EDF, the EDF Swirl and the propeller produced five times higher vorticity at the same wake pitch normalized axial location. It was, however, found …
-
Rethinking the rhetoric of remix: copies and material culture in digital networks
What roles do media technologies, artifacts, and users play in cultural change? This dissertation focuses on the shift from analog to digital media and concentrates on the role played by copies and replication in both systems of representation to identify and analyze material practices and …