CAJ | 학술논문

通过流固双向耦合数值方法，对刚性连接矩形布置的4圆柱系统和交错布置的5圆柱系统在均匀来流中的涡激振动进行了模拟。设计了不同的流向间距比L/D和横向间距比H/D方案，以分析矩形布置和交错布置对圆柱系统从海洋流或河流中利用涡激振动获取能量及能量密度的影响。结果表明当组合间距比LH/D2增加到一定值时，两种布置的圆柱系统其振幅响应和获取能量值趋于稳定。4圆柱系统在L/D=2.5和H/D=2，5圆柱系统在L/D=6和H/D=4时，三个约化速度下能量密度同时出现最大值。根据各组合间距比下振幅响应、获取能量及能量密度的结果发现，若要从水流中获取到更多的水动能，多圆柱系统其布置方式采用交错布置优于矩形布置。
통과류고쌍향우합수치방법，대강성련접구형포치적4원주계통화교착포치적5원주계통재균균래류중적와격진동진행료모의。설계료불동적류향간거비L/D화횡향간거비H/D방안，이분석구형포치화교착포치대원주계통종해양류혹하류중이용와격진동획취능량급능량밀도적영향。결과표명당조합간거비LH/D2증가도일정치시，량충포치적원주계통기진폭향응화획취능량치추우은정。4원주계통재L/D=2.5화H/D=2，5원주계통재L/D=6화H/D=4시，삼개약화속도하능량밀도동시출현최대치。근거각조합간거비하진폭향응、획취능량급능량밀도적결과발현，약요종수류중획취도경다적수동능，다원주계통기포치방식채용교착포치우우구형포치。
A numerical method using two-way coupling between fluid and structure was presented for sim-ulating the vortex-induced vibration of four cylinders with rectangular arrangement and five cylinders with staggered arrangement in uniform currents. Different spacing ratios L/D in flow direction and space ratio H/D in transverse direction was designed to analyze the influence of rectangular arrangement and staggered ar-rangement on harvesting energy and power density from currents making advantage of vortex-induced vi-bration. The results reveal that harvesting energy and amplitude response tend to be stable when combina-tion spacing ratio LH/D2 increased to a certain value. At three different reduced speeds, power density reaches a maximum value when four cylinder system at L/D=2.5, H/D=2 and five cylinder system at L/D=6, H/D=4. According to the results of amplitude response, harvesting energy and power density in different combination space ratio, if more energy is extracted from water currents, the staggered arrangement is bet-ter than the rectangular arrangement for a multi-cylinder system.