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 107 for “"gust"”.
-
Mitigation of Gust Loads Through Pitching
Wind gusts can cause large loads on aerial vehicles, affecting their controllability and hindering their performance. The negative impact is especially significant for small vehicles, which experience relatively stronger gusts due to their low speeds. This raises the necessity of a control approach …
-
Unsteady Aerodynamics of Wing-Gust Encounters
Wind gusts can be highly detrimental to the performance of fixed wing aircraft. At low flight speeds, gusts transverse to the lifting surfaces can cause massive changes to the angle of incidence, fluctuations in lift and drag, and result in flight instability. This may be catastrophic for small …
-
Unsteady Aerodynamics of Wing–Vortex Gust Encounters
Wind gusts induce severe unsteady loads on low-speed aerodynamic devices, limiting the usability of small, slow-flying aircraft such as drones. Expanding the range of conditions under which these aircraft can safely operate requires control systems that can provide the necessary mitigating actions …
-
A CFD framework for aeroelastic gust load calculations
… aeroelastic response of aircraft flying under gust loading was developed. The multiphysics, Finite Volume, VertexCentered code Elementaltextsuperscript{textregistered} was employed and calculations were performed for the transonic flow regime. In the structural domain, the fuselage was treated …
-
Numerical Analysis of an Airfoil Response to an Impinging Gust
… of a loaded airfoil to an impinging vertical gust is investigated in the parametric space of gust intensity and frequency. Computational resources, involving a Linux cluster, were set up and maintained. The code was corrected and adapted to this particular problem. Results are compared with …
-
Improved gust rejection for a micro coaxial helicopter in urban environments
… design a micro coaxial helicopter with improved gust response in complex urban environments. Both experimental flight tests and modeling and simulation tools are developed and executed to analytically understand the challenges and potential solutions to enable rotorcraft to operate efficiently …
-
MICRO AIR VEHICLE SCALE GUST-WING INTERACTION IN A WIND TUNNEL
Studying isolated gust effects on simple airfoil models in a controlled environment is a necessity to further the development of MAV gust response and control laws. This work describes the creation of a vertical gust generator in a low speed, low turbulence wind tunnel through the use of an …
-
Utility of Quasi-Static Gust Loads Certification Methods for Novel Configurations
Aeroelastic gust and maneuver loads have driven the sizing of primary aircraft structures since the beginning of aviation. Methodologies for determining the gust loads on aircraft have evolved over the last 100 years. There are three general approaches to gust loads analysis: quasi-static, …
-
Numerical Investigation of Rotor-Gust Acoustic Interactions Using the OVERFLOW CFD Solver
… the relationship between periodic atmospheric gusts and their impact on rotor performance, unsteady blade loading, and subsequent sound radiation. The research consists of a rigorous three-stage methodology. It begins with the implementation and verification of a momentum-source harmonic gust …
-
Parametric Viscous Analysis of Gust Interaction with Stationary and Elastically Mounted Airfoil
… flows typical of MAV applications in which a gust encounter can induce a particularly significant aerodynamic and aeroelastic response. Efficient source models are developed to introduce sharp-edge and time-harmonic gust perturbations with specified amplitude, frequency and duration inside the …
-
Vibration control and gust alleviation of highly flexible blended-wing-body aircraft
Suppressing the excitation from gusts that flexible vehicles experience in high-altitude, long-endurance flights is critical to improving their flight performance and maintaining stable flight. Aircraft designed for high-altitude, long-endurance flights tend to be more flexible due to the design …
-
The Effect of The Gust Front on The Generation of New Convection
The importance of gust fronts in triggering new storm development is widely recognized. A three-dimensional numerical cloud model developed by Klemp and Wilhelmson is used to study the relationship of new convection to previously generated gust fronts. The model has been modified with a vertically …
-
Pixel-level data fusion techniques applied to the detection of gust fonts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
-
A study of gust response for a rotor-propeller in cruising flight.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1974.
-
Dusty gust fronts and their contributions to long-lived convection in West Africa/
… (MCSs), we must understand the life cycle of gust fronts, which invariably accompany thunderstorms and often initiate them. In this thesis, I track 40 gust fronts observed during summer 2006 by the MIT radar in Niamey, Niger and characterized with ground station measurements. A novel technique …
-
Gust response and its alleviation for a hingeless helicopter rotor in cruising flight.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
-
Optimizing peak gust and maximum sustained wind speed estimates from mid-latitude wave cyclones
… in many countries. Maximum sustained and peak gust weather station data from multiple historic wind storms occurring over more than three decades across Europe were analyzed to identify storm tracks, intensities, and areas of frequent high wind speeds. Wind surfaces for maximum sustained and …
-
Unsteady response of a two-dimensional hydrofoil subject to high reduced frequency gust loading
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1993, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
-
High-Fidelity Modeling of eVTOL Rotor Unsteady Aerodynamic and Aeroacoustic Response to Time-Harmonic Gust
… numerical framework to quantify how periodic gusts influence rotor performance, unsteady loading, and sound radiation.</p> <p>The study employs a three-stage computational methodology using the open-source solver \textit{OpenFOAM v2412} coupled with the \textit{PSU-WOPWOP} acoustic …
-
An Ameliorated Prediction of the Empennage In-Flight Gust Loads for a General Aviation Aircraft
… and a method for determining empennage gust loads is desired. Embry-Riddle, with financial support from the FAA, has flight-tested a C-172P equipped with sensors to develop an ameliorated prediction of the empennage in-flight gust loads for a general aviation aircraft using Neural …
Page 1 of 6