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 20 of 1189 for “"Aerodynamic"”.
-
Three-dimensional aerodynamic trajectories
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1952.
-
Actively conformable aerodynamic surfaces
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
-
Aerodynamic stability of bridges
The aerodynamic characteristics of bridge sections can be determined by simple wind-tunnel tests. These characteristics can then be used to determine the lift force and overturning moment on any bridge section without large scale model tests. Also, the slope of the lift and torque curves obtained …
-
Aerodynamic stability of bridges
… major course of the beginning of research on the Aerodynamic Stability of Suspension Bridges. Wind has wrecked suspension bridges for over a century but the underlying cause, an increasing harmonic amplitude due to wind, has been ignored until recently. For many years bridges have been designed to …
-
Aerodynamic design of annular ducts
This thesis presents mathematical and numerical methods for designing axisymmetric annular ducts having geometries capable of supporting fluid flows with prescribed performance characteristics. Three basic numerical methods of solution are given and are used to obtain results to the known exact …
-
Aerodynamic stability of oscillating bridges
… stability trends have been made and approximate aerodynamic constants evaluated. Observations of the change in energy required to maintain uniform oscillations will indicate the stability of the models and facilitate a more accurate evaluation of the aerodynamic constants. A secondary purpose of …
-
Integrated aerodynamic-structural design optimization
… material properties to improve structural and aerodynamic performance. In order to obtain maximum benefits, a more integrated multidisciplinary design process is required. Furthermore, because of the complexity of the combined aerodynamic/structural design process numerical optimization methods …
-
The aerodynamic response of airborne discs
A study has been conducted to characterize the flow over a free-flying disc. In this study, three types of discs are analyzed in a series of stationary experiments, and a single disc is analyzed in a spinning experiment. Two dimensionless parameters dominate the experiments, the Reynolds number and …
-
Hybrid Methods for Inverse Aerodynamic Design
In this thesis, the hybrid approach has been applied to the development of inverse methods for the design of (1) multi-element airfoils for multipoint velocity and boundary-layer prescriptions and (2) airfoils to obtain desired multipoint velocity distributions on three-dimensional wings and …
-
Aerodynamic fuze characteristics for trajectory control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
-
Aerodynamic investigation of a multiplace fighter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Naval Construction, 1935.
-
Unsteady Nonlinear Aerodynamic Modeling and Applications
Unsteady aerodynamic modeling is indispensable in the design process of rotary air vehicles, flapping flight and agile unmanned aerial vehicles. Undesirable vibrations can cause high-frequency variations in motion variables whose effects cannot be well predicted using quasi-steady aerodynamics. …
-
Integral aerodynamic-structural-control wing design
The aerodynamic-structural-control design of a simplified wing and a forward-swept composite wing are studied. In the first example, the wing is modeled as a beam with a control surface near the wing tip. The torsional stiffness is the only physical property varying along the span. The aerodynamic …
-
Integrated aerodynamic-structural wing design optimization
Several procedures for the simultaneous aerodynamic-structural design optimization of aircraft wings are investigated. These procedures include efficient methods for optimization and sensitivity calculations that are applied to two specific design examples. The first is a subsonic transport …
-
Aerodynamic Trade Study of Compound Helicopter Concepts
… lift and/or propulsive compounding, a suite of aerodynamic performance models was developed using energy methods. In the case of a lift-compounded concept, an aerodynamic model representing the force interaction effects of the main rotor wake with the wing was also developed. Models of a …
-
Aerodynamic Parameter Identification of a Venus Lander
… was conducted to identify the parameters of an aerodynamic model for a Venus lander based on experimental free-flight data. The experimental free-flight data were collected in the NASA Langley 20-ft Vertical Spin Tunnel with a 25-percent Froude-scaled model. The experimental data were classified …
-
Aerodynamic design optimization using flow feature parameterization
… are becoming increasingly popular in the area of aerodynamic design, sustaining the desire to make these methods more computationally efficient. Such design strategies typically define the aerodynamic product using a parametric model of the geometry, but this can often require a large number of …
-
Aerodynamic inverse design of transonic turbomachinery cascades
An aerodynamic inverse design method for turbomachinery cascades is presented and is implemented in a finite volume method. In this design method, the mass-averaged swirl schedule and the blade thickness distribution are prescribed. The design method then provides the blade shape that would …
Page 1 of 60