CAJ | 학술논문

采用CFD技术，模拟得到了开口立方体人工鱼礁绕流的三维水流场。通过速度场模拟结果分析，揭示出了流场效应随开口比变化的规律：①上升流最大速度与来流速度的比、上升流平均速度与来流速度的比、以及上升流最大高度与礁体高度的比均随开口比的增大而降低；②背涡区的尺度随开口比的增大而显著降低，当开口比为0．1和0．2时，在礁体背流面后端形成尺度较大而速度很小的尾涡区，而当开口比为0．5和0．6时背流面后端已无明显旋涡区。此外，模拟结果也揭示出上升流特性参数和速度场分布图案几乎不受来流速度大小的影响。
채용CFD기술，모의득도료개구립방체인공어초요류적삼유수류장。통과속도장모의결과분석，게시출료류장효응수개구비변화적규률：①상승류최대속도여래류속도적비、상승류평균속도여래류속도적비、이급상승류최대고도여초체고도적비균수개구비적증대이강저；②배와구적척도수개구비적증대이현저강저，당개구비위0．1화0．2시，재초체배류면후단형성척도교대이속도흔소적미와구，이당개구비위0．5화0．6시배류면후단이무명현선와구。차외，모의결과야게시출상승류특성삼수화속도장분포도안궤호불수래류속도대소적영향。
Three-dimensional water flow field of rectangular artificial reef under various cut-opening ratios was numerically simulated by using CFD technique .Through analyzing the simulated results , the paper revealed the change law of flow field effect to cut-opening ratio that:①the ratio of the maximum and av-erage velocity of upwelling current to the inflow velocity , the ratio of maximum upwelling height to reef height decrease with the increase of cut-opening ratio; ②the size of the wake vortex region is reduced with the increase of the cut-opening ration , a large wake vortex region with very small flow velocity is formed when the cut-opening ratioes are 0.1 and 0.2, whereas no obvious wake vortex region are per-ceived when the cut-opening ratio is equal to 0.5 and 0.6.Moreover, the simulation results reveal that the parameters for upwelling current and the map of distribution for velocity field are hardly affected by the magnitude of inflow velocity .