Experimental and Numerical Investigation of Hydrodynamic Performance of a Sloping Floating Breakwater with and Without Chain-Net

2021 ◽  
Author(s):  
Sahel Sohrabi ◽  
Mohamad Ali Lotfollahi Yaghin ◽  
Mohamad Hosein Aminfar ◽  
Alireza Mojtahedi
Keyword(s):  
Numerical Investigation ◽  
Hydrodynamic Performance ◽  
Floating Breakwater

scholarly journals Numerical Investigation on Hydrodynamic Performance of a Portable AUV

2021 ◽  
Vol 9 (8) ◽  
pp. 812
Author(s):  
Lin Hong ◽  
Renjie Fang ◽  
Xiaotian Cai ◽  
Xin Wang
Keyword(s):  
Numerical Investigation ◽  
Dynamic Model ◽  
Autonomous Underwater Vehicle ◽  
Dynamic Performance ◽  
Plane Motion ◽  
Hydrodynamic Performance ◽  
Wave Forces ◽  
Modeling And Control ◽  
Experiment Platform ◽  
Cfd Method

This paper conducts a numerical investigation on the hydrodynamic performance of a portable autonomous underwater vehicle (AUV). The portable AUV is designed to cruise and perform some tasks autonomously in the underwater world. However, its dynamic performance is strongly affected by hydrodynamic effects. Therefore, it is crucial to investigate the hydrodynamic performance of the portable AUV for its accurate dynamic modeling and control. In this work, based on the designed portable AUV, a comprehensive hydrodynamic performance investigation was conducted by adopting the computational fluid dynamics (CFD) method. Firstly, the mechanical structure of the portable AUV was briefly introduced, and the dynamic model of the AUV, including the hydrodynamic term, was established. Then, the unknown hydrodynamic coefficients in the dynamic model were estimated through the towing experiment and the plane-motion-mechanism (PMM) experiment simulation. In addition, considering that the portable AUV was affected by wave forces when cruising near the water surface, the influence of surface waves on the hydrodynamic performance of the AUV under different wave conditions and submerged depths was analyzed. Finally, the effectiveness of our method was verified by experiments on the standard models, and a physical experiment platform was built in this work to facilitate hydrodynamic performance investigations of some portable small-size AUVs.

Numerical investigation and evaluation of optimum hydrodynamic performance of a horizontal axis hydrokinetic turbine

2011 ◽  
Vol 3 (6) ◽  
pp. 063105 ◽  
Author(s):  
Suchi Subhra Mukherji ◽  
Nitin Kolekar ◽  
Arindam Banerjee ◽  
Rajiv Mishra
Keyword(s):  
Numerical Investigation ◽  
Horizontal Axis ◽  
Hydrodynamic Performance ◽  
Hydrokinetic Turbine

Hydrodynamic performance of a T-shaped floating breakwater

2019 ◽  
Vol 82 ◽  
pp. 325-336 ◽  
Author(s):  
Zhengzhi Deng ◽  
Lin Wang ◽  
Xizeng Zhao ◽  
Zhiyong Huang
Keyword(s):  
Hydrodynamic Performance ◽  
Floating Breakwater

On the hydrodynamic performance of a vertical pile-restrained WEC-type floating breakwater

2020 ◽  
Vol 146 ◽  
pp. 414-425 ◽  
Author(s):  
Qiang Chen ◽  
Jun Zang ◽  
Jonathan Birchall ◽  
Dezhi Ning ◽  
Xuanlie Zhao ◽  
...  
Keyword(s):  
Hydrodynamic Performance ◽  
Floating Breakwater

Hydrodynamic Performance of a Novel Free Surface Pitching Breakwater

2014 ◽  
Author(s):  
Vengatesan Venugopal ◽  
Stefan Zlatev
Keyword(s):  
Body Shape ◽  
Hydrodynamic Performance ◽  
Irregular Waves ◽  
Scale Model ◽  
Reflected Waves ◽  
Irregular Wave ◽  
Wave Flume ◽  
Floating Breakwater ◽  
Wave Heights ◽  
Transmission Ct

A new concept floating breakwater was developed and tested to evaluate its hydrodynamic performance in this paper. This innovative floating breakwater has a rocking body shape which could also be used as a wave power device. A scale model was tested in a wave flume under regular and irregular wave conditions for various combinations of wave frequencies and wave heights. The breakwater has been tested for three immersion depths of 0.05 m, 0.09 m and 0.13 m from still water level. The measured transmitted and reflected waves were used to evaluate the coefficients of transmission (CT), reflection (CR) and dissipation (CL). The results illustrated that the breakwater model performed at its best when submerged at 0.13m, as this immersion depth produced lower coefficients of transmission (CT), lower reflection coefficients (CR) and higher energy dissipation (CL) coefficients. The comparison between regular and irregular waves produced similar ranges of transmission, reflection and energy coefficients.

Numerical investigation on the hydrodynamic performance of variable length blade tidal turbine: an attribute to enhance energy capture

2016 ◽  
Vol 11 (3) ◽  
pp. 347-352 ◽  
Author(s):  
Farhana Arzu ◽  
Hossain Hassanpour Darvishi ◽  
Roslan Bin Hashim ◽  
Pezhman Taherei Ghazvinei ◽  
Mahmudur Rahman Soeb
Keyword(s):  
Numerical Investigation ◽  
Variable Length ◽  
Hydrodynamic Performance ◽  
Energy Capture ◽  
Tidal Turbine
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