การทดสอบประสิทธิภาพในการลดพลังงานคลื่นของเขื่อนสลายพลังงานคลื่น โดยใช้แบบจำลองทางกายภาพ / อาศวิน อินทสุภา = The efficiency test on wave energy reuction of pile breakwater using physical model / Ar-sawin Intasupa
Physical model was used to test the efficiency of wave energy reduction of pile breakwater. The model was scaled down from the prototype at the proportion of 5 to 1. Seven parameters; namely wave height, wave period, water depth, spacing between row, spacing between pile in the row, angle of incident wave and orientation of pile in the row, were tested. Each parameter has 3-steps values, namely low, medium and high value. The breakwater was composed of either one, two, three or four rows of pile. Using the medium values for each parameter as baseline case, each parameter was varied to low and high values one at a time. Using the information from varying one parameter at a time, varying pairs of parameter were chosen for further test. Statistical analyses were performed on the experimental results to evaluate the best breakwater arrangement that would best reduce the incoming wave energy. The test results either varying one parameter or a pair of parameters showed that wave energy reduction was greater when using high wave height, more rows of pile, low wave period and less pile spacing in the same row. The highest wave energy reduction (53%) when varying a pair of parameters was achieved when using 3 rows of pile, short wave period and low angle of pile alignment with the breakwater. And the best result (40%) when varying just one parameter was achieved when using 3 rows of pile and short wave period. When comparing capital investment of building the breakwater with its effectiveness in reducing the wave energy, the economy investment occurred when using 3 rows of pile with 1.5-m spacing between each pile in the row.
