Wave Maker in a Circulating Water Channel

スポンサーリンク

概要

• 論文の詳細を見る

• An apparatus of exciting a wave-suppressor plate usually equipped at outlet top of a circulating water channel (CWC) in heave and pitch motion is devised for making a progressive wave system with only one wave length on the water surface of a uniform flow in the CWC in order to conduct ship model performance test in waves. As well known an oscillating body in a uniform flow makes generally four progressive wave systems or two systems, the wave number being α_1 (following wave) and α_2 (head wave), in usual test conditions for model ships. At first a numerical simulation is performed by applying the two-dimensional linear theory of an oscillating planing plate to confirm possibility of making α_1-wave disappear and of generating α_2-wave only and to obtain α_1-wave-free condition of combination of heaving and pitching of the wave-suppressor-plate. Next, experiments are conducted in a small CWC after developing a method of separating α_1- and α_2-components from the measured envelop of beating waves generated by the oscillating suppressor-plate. Through some iterations of a process of getting α_1-wave-free condition of oscillation combination of the wave-suppressor-plate from the two experiments of different combinations, wave fields consisting of only α_2-wave are obtained for three frequencies (3,4 and 5Hz) and two amplitudes at three velocities (0.5〜1.0m/s). Though these α_1-wave-free results do not correspond very well with the simulations mainly due to the non-linearity of the real motion of the wave-suppressor-plate, it is concluded that more accumulation of experimental data makes this type of wave maker generate any progressive wave system with single wave length in CWC.

• 社団法人日本船舶海洋工学会の論文
• 2002-09-25

著者

• Kihara H

  Dept. Of Mechanical Systems Engineering National Defence Academy

• Kihara Hajime

  Dept. Of Mechanical Systems Engineering National Defense Academy

• Suzuki K

  Dept. Of Mechanical Systems Engineering National Defence Academy

• Suzuki Katsuo

  Dept. Of Mechanical Systems Engineering National Defense Academy

• WADA Takahiro

  Dept. of Mechanical Systems Engineering, National Defence Academy

• Wada Takahiro

  Dept. Of Mechanical Systems Engineering National Defence Academy

関連論文

• Wave Maker in a Circulating Water Channel
• On the Characteristics of an Absorbing Wavemaker with a Cross Section Having a Plumb Part near the Free Surface

スポンサーリンク