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Unsteady RANS Simulations of Wells Turbine Under Transient Flow Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Unsteady RANS Simulations of Wells Turbine Under Transient Flow Conditions;This paper presents our recent numerical simulations of a high-solidity Wells turbine under both steady and unsteady conditions by solving ...
Model-Based Control and Stability Analysis of Underactuated Autonomous Underwater Vehicles Via Singular Perturbations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the control design and stability analysis for path-following of underactuated autonomous underwater vehicles (AUVs), with dynamics restricted to the horizontal plane. As illustration, the time-scale ...
A Simulation Study on the Dynamic Stability of a Fluid-Conveying Pipe With a Constant Velocity Leakage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Motivated by the fact that a leaking pipe can lose or gain energy from the leaking flow, this study attempts to explore the nonconservative leaking flow effect on the dynamic stability of a simply supported pipe with a ...
Structural Dynamic Analysis of a Tidal Current Turbine Using Geometrically Exact Beam Theory
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a numerical study of the dynamic performance of a vertical axis tidal current turbine. First, we introduce the geometrically exact beam theory along with its numerical implementation the geometric exact ...
Extended Environmental Contour Methods for Long-Term Extreme Response Analysis of Offshore Wind Turbines1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Environmental contour method is an efficient method for predicting the long-term extreme response of offshore structures. The traditional environmental contour is obtained using the joint distribution of mean wind speed, ...
Numerical and Experimental Investigation on Nonlinear Cyclic Collapse Response of Ship Model in Regular Waves
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Large ocean waves with large wave height may destroy the ship’s structure, whereas it is difficult to predict the nonlinear dynamic strength in the large waves. In this study, we used a nonlinear simulation based on boundary ...
Numerical Investigation of Mechanisms Underlying Oceanic Internal Gravity Wave Power-Law Spectra
Publisher: American Meteorological Society
Abstract: We consider the power-law spectra of internal gravity waves in a rotating and stratified ocean. Field measurements have shown considerable variability of spectral slopes compared to the high-wavenumber, high-frequency ...