Abstract
This paper describes the design and fabrication of a wave flume and associated equipment. The water wave generation by a triangle wedge is examined in this paper. Wave flume is fabricated by a concrete flume, which is 0.75-meter-wide, 1.3-meter-tall, and 11 meters long. One side of the flume is made of concrete, and the other side is made of clear mica sheets for observe the water wave profile. Wave flume is equipped with a triangle wedge located at one end of the wave flume, and this triangle wedge can be move along the rail of the wave flume. The passive wave absorber, which is made of honeycomb, which is located at the other end of the wave flume for absorbing energy waves generated from the wavemaker. The wedge is controlled by a desktop computer through Matlab software. The wedge can be controlled move up and down at a prescribed speed and oscillation amplitude corresponding to the desired wave height and wave frequency. At the middle flume is equipped microlaser distance sensor, which provides the data-logging capability. The microlaser distance sensor can collect wave height and wave period through a small ball, which is motioned in the tube, which is assembled on the water surface, and the small ball is very slight to avoid kinetic inertia energy. At the wavemaker is equipped with an Eccentricity Sensor, which is used to measure the wedge position to feedback for a desktop computer. Wave flume can generate the largest waves are about 0.2 meter high, a period about 1 second, and a wavelength of about 1.5 meters. The waves generated by an oscillating wedge have been measured, analyzed to consider the generated wave energy.
Highlights
Ocean wave energy is the natural resource to be exploited as a renewable source of energy, while coinciding with the aim of reducing our reliance on fossil fuel sources
Experimental wave flumes are very useful to test the performance of wave energy conversions
This paper describes the design and fabrication of a wave flume with the plunger-type wavemakers and associated equipment, the waves generated by a sinusoidal oscillating wedge have been measured and analyzed
Summary
Ocean wave energy is the natural resource to be exploited as a renewable source of energy, while coinciding with the aim of reducing our reliance on fossil fuel sources. The movable wall type generators are used where the water is shallow compared to the wavelength of the waves. The orbital particle motion is compressed into an ellipse and there is significant horizontal motion on floor of the tank This type of paddle is used to generate waves for modelling coastal structures, harbours and shore mounted wave energy devices. The second is the plunger-type wavemakers 5, which generates waves by oscillating vertically in the surface of water (Figure 3). The machine is very compact, as the shape is wedge, the flume can be designed to work with water behind the wave maker with almost no generation of back waves 4.
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