CAJ | 학술논문

文章基于分离涡数值模拟法对不同来流速度和不同来流方向下FDPSO水动力系数（包括阻力系数、升力系数和压力系数）进行了数值模拟和分析。主要结论如下：升、阻力系数时历曲线表现为“脉动性”，由于上游立柱周期性尾涡作用，导致下游立柱阻力系数较上游立柱系数略大；下游立柱升力系数周期性强于上游立柱。由于浮箱布置不同，串列与并列浮箱之间阻力系数与升力系数表现不同。由于P5位于P1“屏蔽区”，导致P5阻力系数较P1阻力系数小；而P6受到P8尾流作用，导致P8阻力系数较P6大。由于并列浮箱之间流体排斥性作用，导致P3和P7、P4和P6升力系数均值为一正一负，但P4和P6所受升力系数较P3和P7要大。由于流场三维特性与尾涡各向向异性特点，导致不同截面下压力系数为“W”型变化趋势，表现出驻点/尾涡撞击点、边界层附着区和尾涡分离区域。
문장기우분리와수치모의법대불동래류속도화불동래류방향하FDPSO수동력계수（포괄조력계수、승력계수화압력계수）진행료수치모의화분석。주요결론여하：승、조력계수시력곡선표현위“맥동성”，유우상유립주주기성미와작용，도치하유립주조력계수교상유립주계수략대；하유립주승력계수주기성강우상유립주。유우부상포치불동，천렬여병렬부상지간조력계수여승력계수표현불동。유우P5위우P1“병폐구”，도치P5조력계수교P1조력계수소；이P6수도P8미류작용，도치P8조력계수교P6대。유우병렬부상지간류체배척성작용，도치P3화P7、P4화P6승력계수균치위일정일부，단P4화P6소수승력계수교P3화P7요대。유우류장삼유특성여미와각향향이성특점，도치불동절면하압력계수위“W”형변화추세，표현출주점/미와당격점、변계층부착구화미와분리구역。
Based on Detached Eddy Simulation, numerical simulation and analysis of force coefficients (drag coefficient, lift coefficient and pressure coefficient) of FDPSO under different incoming velocities and di-rections are studied . This paper demonstrates that time histories of drag and lift coefficient show ‘beat-ing’ behavior. Because of periodic vortex from upstream column, drag coefficient of downstream column is bigger than that of upstream column. The periodic characteristic of lift coefficient of downstream column is stronger than that of upstream column. Due to pontoons arranged by different positions, drag and lift coef-ficients of columns in tandem arrangement and arranged side by side are different. Because of ‘shielding’ effect, drag coefficient of P5 is little than that of P1. But drag coefficient of P8 is larger than that of P6 un-der the wake of P8. Because exclusion is between pontoons arranged side by side, averaged lift coefficient of them is not dissimilar symbolically and size is almost equal. But lift coefficients of P4 and P6 are larger than that of P3 and P7. The flow is three-dimensional and vortex is anisotropic, which results in different pressure coefficient distribution under different span wise positions and tendency of ‘W’ pattern showing stagnation and collapsed points, attached region of boundary layer and separation region of vortex.