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

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

scholarly journals Hydrodynamic performance evaluation of a tidal turbine with leading-edge tubercles

2016 ◽  
Vol 117 ◽  
pp. 246-253 ◽  
Author(s):  
Weichao Shi ◽  
Roslynna Rosli ◽  
Mehmet Atlar ◽  
Rosemary Norman ◽  
Dazheng Wang ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Leading Edge ◽  
Hydrodynamic Performance ◽  
Tidal Turbine

Numerical investigation of flow motion and performance of a horizontal axis tidal turbine subjected to a steady current

2015 ◽  
Vol 29 (2) ◽  
pp. 209-222 ◽  
Author(s):  
Lin-juan Li ◽  
Jin-hai Zheng ◽  
Yu-xuan Peng ◽  
Ji-sheng Zhang ◽  
Xiu-guang Wu
Keyword(s):  
Numerical Investigation ◽  
Horizontal Axis ◽  
Steady Current ◽  
Flow Motion ◽  
Tidal Turbine ◽  
And Performance

scholarly journals An Actuator Disc Analysis of a Ducted High-Solidity Tidal Turbine in Yawed Flow

2019 ◽  
Author(s):  
Mitchell G. Borg ◽  
Qing Xiao ◽  
Atilla Incecik ◽  
Steven Allsop ◽  
Christophe Peyrard
Keyword(s):  
Fluid Dynamic ◽  
Computational Fluid Dynamic Model ◽  
Hydrodynamic Performance ◽  
Speed Ratio ◽  
Angular Range ◽  
Power Development ◽  
Tip Speed Ratio ◽  
Power Increase ◽  
Actuator Disc ◽  
Tidal Turbine

Abstract This work elaborates a computational fluid dynamic model utilised in the investigation of the hydrodynamic performance concerning a ducted high-solidity tidal turbine in yawed inlet flows. Analysing the performance at distinct bearing angles with the axis of the turbine, increases in torque and mechanical rotational power were acknowledged to be induced within a limited angular range at distinct tip-speed ratio values. Through multiple yaw iterations, the peak attainment was found to fall between bearing angles of 15° and 30°, resulting in a maximum power increase of 3.22%, together with an extension of power development to higher tip-speed ratios. In confirmation, these outcomes were subsequently analysed by means of actuator disc theory, attaining a distinguishable relationship with blade-integrated outcomes.

scholarly journals The effect of a barnacle-shaped excrescence on the hydrodynamic performance of a tidal turbine blade section

2020 ◽  
Vol 217 ◽  
pp. 107849
Author(s):  
J.S. Walker ◽  
R.B. Green ◽  
E.A. Gillies ◽  
C. Phillips
Keyword(s):  
Turbine Blade ◽  
Hydrodynamic Performance ◽  
Tidal Turbine ◽  
Blade Section

Tidal Turbine Blade Selection for Optimal Performance in an Array

2011 ◽  
Author(s):  
Rachel F. Nicholls-Lee ◽  
Stephen R. Turnock ◽  
Stephen W. Boyd
Keyword(s):  
Tidal Cycle ◽  
Free Stream ◽  
Stokes Equations ◽  
Tidal Energy ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Energy Capture ◽  
Tidal Turbines ◽  
Outer Domain ◽  
Tidal Turbine

In order to maximize tidal energy capture from a specific site free stream devices are situated in arrays. In an array the downstream evolution of the wake generated by a rotating tidal energy conversion device influences the performance of the device itself, the bypass flow to either side as well as the performance of any downstream device. As such it is important to design a turbine that can perform efficiently and effectively in these circumstances. Use of passively adaptive composite blades for horizontal axis tidal turbines has been shown to improve performance in fluctuating inflows. Active adaptation and/or bi-directional hydrofoil sections could be implemented in order to optimize performance throughout the tidal cycle. This paper considers the performance in an array of four free stream turbines implementing standard rigid blades, wholly bidirectional blades, passively adaptive blades and actively adaptive blades. The method used to evaluate the performance of tidal current turbines in arrays couples an inner domain solution of the blade element momentum theory with an outer domain solution of the Reynolds averaged Navier Stokes equations. The annual energy capture of four devices with each blade type in a staggered array is then calculated for a single tidal cycle and compared.

scholarly journals Influence of Central Platform on Hydrodynamic Performance of Semi-Submerged Multi-Buoy Wave Energy Converter

2019 ◽  
Vol 8 (1) ◽  
pp. 12
Author(s):  
Yuan Hu ◽  
Shaohui Yang ◽  
Hongzhou He ◽  
Hu Chen
Keyword(s):  
Numerical Analysis ◽  
Wave Energy ◽  
Wave Energy Converter ◽  
Hydrodynamic Performance ◽  
Theoretical Research ◽  
Width Ratio ◽  
Energy Converter ◽  
Wave Condition ◽  
Energy Capture ◽  
Central Platform

The influence of the central platform on hydrodynamic performance of a wave energy converter (WEC) has remained elusive. To approach this dearth of relevant theoretical research, this paper presents a semi-submerged multi-buoy WEC and the results of the numerical analysis at different dimension parameters of the central platform of the WEC. The WEC consists of three oscillating buoys hinged with a central platform through multiple actuating arms. Numerical analysis revealed that there exists a relationship between the hydrodynamic performance of device and the geometry of the central platform. At the given wave condition, different central platform size would obviously affect the hydrodynamic performance and wave energy capture width ratio of the semi-submerged multi-buoy WEC. Additionally, appropriately increasing central platform draft would help to improve the wave energy capture capability of the oscillating buoys.

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