Numerical Analysis of the Performance of Perforated Coastal Structures under Irregular Wave Conditions

2015 ◽  
Vol 315 ◽  
pp. 1159-1169
Author(s):  
Insik Chun ◽  
Hak Soo Lim ◽  
Jae Seol Shim ◽  
Kyung Soo Park
Keyword(s):  
Numerical Analysis ◽  
Coastal Structures ◽  
Irregular Wave ◽  
Wave Conditions

Experimental study for characteristics of slamming loads on bow of a ship-type FPSO under breaking and irregular wave conditions

2021 ◽  
Vol 224 ◽  
pp. 108738
Author(s):  
Yoon-Jin Ha ◽  
Kyong-Hwan Kim ◽  
Bo Woo Nam ◽  
Sa Young Hong ◽  
Hyunjoe Kim
Keyword(s):  
Experimental Study ◽  
Irregular Wave ◽  
Wave Conditions

scholarly journals IRREGULAR WAVE OVERTOPPING RATES

1984 ◽  
Vol 1 (19) ◽  
pp. 22 ◽  
Author(s):  
Scott L. Douglass
Keyword(s):  
Shallow Water ◽  
Shore Protection ◽  
Coastal Structures ◽  
Wave Overtopping ◽  
Manual Method ◽  
Irregular Wave ◽  
Order Of Magnitude

Methods for estimating wave overtopping of coastal structures are reviewed and compared with the very limited available data and with each other. The different methods yield results which can vary more than an order-of-magnitude. For vertical seawalls, the U. S. Army Engineer Shore Protection Manual method estimates more overtopping than Goda's method except in very shallow water. For sloped structures, the Shore Protection Manual method usually estimates less overtopping than Battjes' method and Owen's method. However, data for adequately evaluating how well these methods predict overtopping has not been published.

The Optimization of Blade Pitch Settings of an Air Turbine Using Self-Pitch-Controlled Blades For Wave Power Conversion

2001 ◽  
Vol 123 (4) ◽  
pp. 382-386 ◽  
Author(s):  
T. H. Kim ◽  
T. Setoguchi ◽  
K. Kaneko ◽  
M. Takao
Keyword(s):  
Oscillating Water Column ◽  
Flow Conditions ◽  
Irregular Wave ◽  
Turbine Performance ◽  
Air Chamber ◽  
Air Turbine ◽  
Wave Power Conversion ◽  
Wave Conditions ◽  
Starting Characteristics ◽  
Blade Pitch Angle

This work investigated an air turbine with self-pitch-controlled blades operating in the airflow generated by an oscillating water column (OWC) under irregular wave conditions to determine turbine performance and identify the optimum blade pitch angle setting. Rotor models with fixed blades were tested under steady flow conditions. The running and starting characteristics of the turbine under irregular wave conditions were determined from a computer simulation that modeled both the turbine and the air chamber. The performance of the air turbine was evaluated and the optimum rotor blade limit was found to be about 10°.

EXPERIMENTAL STUDY OF IMMERSED PLATES USED AS BREAKWATERS

1988 ◽  
Vol 1 (21) ◽  
pp. 168
Author(s):  
Alain Drouin ◽  
Yvon Ouellet
Keyword(s):  
Experimental Study ◽  
Volume Of Fluid ◽  
Irregular Wave ◽  
Wave Flume ◽  
Water Wall ◽  
Harmonic Frequencies ◽  
Hydraulic Conditions ◽  
Wave Trains ◽  
Wave Conditions

Under certain wave conditions, an immersed plate which is free to move horizontally produces what has already been called the oscillating water wall phenomenon. When this happens, the plate and the volume of fluid located under the plate move back and forth and then behave as a wave reflector. This type of breakwater was studied in a wave flume with monochromatic and irregular wave trains. Tests have provided a better understanding of the influence of certain parameters that define a plate and the hydraulic conditions under which the plate is used. Results show some interesting efficiencies and also transfert of the energy to harmonic frequencies.

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