Thesis
Numerical analysis and experimental demonstration of ground-effect enhanced high-speed marine vehicles
Washington State University
Master of Science (MS), Washington State University
2012
Handle:
https://hdl.handle.net/2376/100863
Abstract
Ground effect, the enhancement of the lifting capacity of an aerodynamic surface when in proximity to land or water, is a result of the partial stagnation of air entrained between the aerodynamic surface and ground. High speed marine vehicles can take advantage of this effect to increase performance parameters such as maximum speed, lifting capacity, or efficiency, above that of traditional transport methods. Although conceptually appealing, ground effect enhanced high-speed marine vehicles have not experienced widespread implementation, in part due to the increased complexity of their dynamical systems in comparison to airplanes or traditional planing boats. The work presented herein seeks to help address this issue. A mathematical model was developed to simulate time-domain motions of a 5000 kg tunnel hull boat utilizing partial aerodynamic support from a 10 m x 1.5 m platform. Aerodynamic lift and drag are calculated from the extreme ground effect theory. The added-mass-strip-theory is used to compute hydrodynamic forces acting on the hulls. Boat equilibrium states, as well as vertical plane, time-domain motions in response to wind gusts and waves, are studied. Heave and pitch response to wave action is studied and resonance is determined to be within wavelengths of 55 m to 60 m. Self-propelled experimental models were developed to measure the behavior of wingin-ground and power-augmented-ram-air vehicles and facilitate future research. These vehicles were capable of both flying and sliding modes of operation both on land and water.
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Details
- Title
- Numerical analysis and experimental demonstration of ground-effect enhanced high-speed marine vehicles
- Creators
- Christopher Scott Chaney
- Contributors
- Konstantin I. Matveev (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525143401842
- Language
- English
- Resource Type
- Thesis