中文摘要：

经过在双人脚踏车安排的三倍的柱体(TriC ) 的大规模分开的流动用改进推迟的分开旋涡的模拟(IDDES ) 被模仿方法基于 shear 压力运输(SST ) 当模特儿，结合了高顺序适应驱散计划。在邻近的柱体之间的间距是亚 critical (1.435D ) 。有一样的间距的二柱体(TC ) 的 IDDES 预言与为确认的试验性的数据相比，并且数字结果与可得到的大小同意很好，除了在差距区域的不对称现象。经过 TriC 的流动用一样的方法被调查。通常，经过 TriC 的吝啬的流动数量例如速度，压力，和涡度，类似于 TC 的相应部件。然而， TriC 表面上的压力变化比 TC 上的那些一致地大。同时，经过 TriC 的即时流动是更多建筑群。在第一个差距区域的期刊阻塞在 TriC 案例中被发现并且导致起伏的运动砍在第二个差距区域的层。图形的摘要双人脚踏车柱体安排为流动相互作用和 aeroacoustics 的学习作为简化登陆齿轮几何学被建议，它包含复杂流动现象和相互作用。改进推迟的分开旋涡的模拟(IDDES ) 在精确数字预言显示出混合 RANS/LES 方法的可观的诺言大规模分开了并且高度不稳定的狂暴的流动，提供的视觉上详细的流动结构，进不稳定的流动现象的机制的量的卓见，和精确声音为噪音采购原料预言。

英文摘要：

The massively separated flow past triple cylin- ders （TriC） in tandem arrangement is simulated using the improved delayed detached-eddy simulation （IDDES） method based on the shear stress transport （SST） model, coupled with the high order adaptive dissipation scheme. The spacing between adjacent cylinders is sub-critical （1.435D）. IDDES prediction of two cylinders （TC） with the same spacing is compared to experimental data for validation, and the numerical results agree well with the available measurements, except for the asymmetry in the gap region. The flow past TriC is investigated using the same method. Generally, the mean flow quantities past TriC, such as the velocity, pressure, and vorticity, are similar to the corresponding components of TC. However, the pressure fluctuations on the TriC surface are uniformly larger than those on TC. Meanwhile, the instantaneous flows past TriC are much more complex. The periodical blockage in the first gap region is found in the TriC case and leads to the up-and-down movement of shear layer in the second gap region.