Date of Award
Fall 12-2014
Degree Type
Thesis-Restricted
Degree Name
M.S.
Degree Program
Naval Architecture and Marine Engineering
Department
Naval Architecture and Marine Engineering
Major Professor
Dr. Nikolas Xiros
Second Advisor
Dr. Lothar Birk
Third Advisor
Dr. Brandon Taravella
Abstract
In this work, the data analysis of oscillating flapping fins is conducted for mathematical model. Data points of heave and surge force obtained by the CFD (Computational Fluid Dynamics) for different geometrical kinds of flapping fins. The fin undergoes a combination of vertical and angular oscillatory motion, while travelling at constant forward speed. The surge thrust and heave lift are generated by the combined motion of the flapping fins, especially due to the carrier vehicle’s heave and pitch motion will be investigated to acquire system identification with CFD data available while the fin pitching motion is selected as a function of fin vertical motion and it is imposed by an external mechanism. The data series applied to model unsteady lifting flow around the system will be employed to develop an optimization algorithm to establish an approximation transfer function model for heave force and obtain a predicting black box system with nonlinear theory for surge force with fin motion control synthesis.
Recommended Citation
Aktosun, Erdem, "Identification of hydrodynamic forces developed by flapping fins in a watercraft propulsion flow field" (2014). University of New Orleans Theses and Dissertations. 1900.
https://scholarworks.uno.edu/td/1900
Included in
Aerodynamics and Fluid Mechanics Commons, Controls and Control Theory Commons, Navigation, Guidance, Control and Dynamics Commons, Propulsion and Power Commons, Signal Processing Commons, Systems Engineering and Multidisciplinary Design Optimization Commons
Rights
The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this dissertation or thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis or dissertation.