The present research work concerns about the hydrodynamic behaviors of the open net offshore fish cages of single,double and 4-cage systems subjected to regular sinusoidal waves.The open net semisubmersible rigid cage...The present research work concerns about the hydrodynamic behaviors of the open net offshore fish cages of single,double and 4-cage systems subjected to regular sinusoidal waves.The open net semisubmersible rigid cage is square in shape and analyzed numerically using ANSYS AQWA software.Frequency and time domain analyses are carried out for each case.The hydrodynamic parameters such as added mass,radiation potential damping,motion responses and mooring line tensions are considered as performance indicators to conclude as the best arrangements among three different cages.The single cage and windward side of all cages exhibit identical performance in all hydrodynamic parameters.The leeward side of each cage shows lesser parametric values than the windward side cages.Based on the performance indicators,it is concluded that the grid system containing four cage arrangements provides better performance than three other cage configurations.An experimental model of 1∶75 scale is fabricated and wave flume studies are conducted to validate the present numerical model.The cage is placed at a water depth of 55 cm and subjected to wave heights of 12 cm and 14 cm with wave periods ranging from 0.8 s to 2.2 s with an interval of 0.2 s are considered.The same wave flume boundary conditions are adopted for numerical simulations and results are in good agreement with experimental work results.展开更多
Recently,most wave energy research has targeted sea areas with high power density under extreme wave conditions for deployment.This trend often leads to higher energy costs for wave power plants.However,many marine ar...Recently,most wave energy research has targeted sea areas with high power density under extreme wave conditions for deployment.This trend often leads to higher energy costs for wave power plants.However,many marine areas with low power density,characterized by wavelet conditions and less destructive forces than extreme wave conditions,remain underexplored.Therefore,this study aimed to propose a wave-activated body model for sea regions with wavelet conditions.The wave-activated body design process encompassed site selection,parameter determination,geometry design,comparison and performance evaluation using the ANSYS®AQWA model.The results indicated that the proposed device achieved the desired heave motion,with an amplitude range of 1.2 to-2.5 m,validating its potential for deployment in marine regions with wavelet conditions.Notably,while the proposed design is optimized for wavelet conditions,it was found to have potential limitations in extreme wave environments.This observation emphasizes the challenge of formulating a generalized design suitable for both conditions.Consequently,it is pivotal for wave-activated body designs to be customized based on the specific ocean conditions they target,underscoring the need for specialized designs of wave energy converters that consider the unique wave characteristics of their deployment sites.展开更多
文摘The present research work concerns about the hydrodynamic behaviors of the open net offshore fish cages of single,double and 4-cage systems subjected to regular sinusoidal waves.The open net semisubmersible rigid cage is square in shape and analyzed numerically using ANSYS AQWA software.Frequency and time domain analyses are carried out for each case.The hydrodynamic parameters such as added mass,radiation potential damping,motion responses and mooring line tensions are considered as performance indicators to conclude as the best arrangements among three different cages.The single cage and windward side of all cages exhibit identical performance in all hydrodynamic parameters.The leeward side of each cage shows lesser parametric values than the windward side cages.Based on the performance indicators,it is concluded that the grid system containing four cage arrangements provides better performance than three other cage configurations.An experimental model of 1∶75 scale is fabricated and wave flume studies are conducted to validate the present numerical model.The cage is placed at a water depth of 55 cm and subjected to wave heights of 12 cm and 14 cm with wave periods ranging from 0.8 s to 2.2 s with an interval of 0.2 s are considered.The same wave flume boundary conditions are adopted for numerical simulations and results are in good agreement with experimental work results.
基金funded by MTC Engineering Sdn.Bhd.under fund number MTCE/INTERN001/0011/16092022-1UCSI University under fund number Proj-In-FETBE-058.
文摘Recently,most wave energy research has targeted sea areas with high power density under extreme wave conditions for deployment.This trend often leads to higher energy costs for wave power plants.However,many marine areas with low power density,characterized by wavelet conditions and less destructive forces than extreme wave conditions,remain underexplored.Therefore,this study aimed to propose a wave-activated body model for sea regions with wavelet conditions.The wave-activated body design process encompassed site selection,parameter determination,geometry design,comparison and performance evaluation using the ANSYS®AQWA model.The results indicated that the proposed device achieved the desired heave motion,with an amplitude range of 1.2 to-2.5 m,validating its potential for deployment in marine regions with wavelet conditions.Notably,while the proposed design is optimized for wavelet conditions,it was found to have potential limitations in extreme wave environments.This observation emphasizes the challenge of formulating a generalized design suitable for both conditions.Consequently,it is pivotal for wave-activated body designs to be customized based on the specific ocean conditions they target,underscoring the need for specialized designs of wave energy converters that consider the unique wave characteristics of their deployment sites.
