Numerical simulations are carried out to study the flow around two tandem square cylinders (SC) under the effect of spacing ratio(g/D) and splitter plate length (l/D) for a fixed Reynolds number (Re) = 100. The g/D is varied from 0 to 10 and l/D is varied from 0.5 to 10. The splitter plate length is found to have strong effect on vortex shedding and fluid forces. The maximum reduction in mean drag coefficient is observed at l/D = 8, that is 15% and 78% for upstream and downstream cylinders, respectively. The maximum reduction in root-mean-square value of lift coefficient is found at l/D = 10, that is 99%. The flow pattern at both of these points is steady flow. There is 100% vortex shedding suppression for l/D > 5. The observed flow patterns for flow past tandem cylinders without splitter plate are; single bluff body (SBB), steady flow (SF), quasi-steady flow (QSF), fully developed flow (FDF) and fully developed two-row vortex street flow (FDTRVS) regimes. SBB, QSF and SF regimes were observed in presence of splitter plate.

中文翻译：

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存在附加分流板时流经两个串联气缸的流动特性和流体力降低

进行数值模拟以研究在固定雷诺数 (Re) = 100 的间距比 ( g/D ) 和分流板长度 ( l/D )的影响下，两个串联方圆柱 (SC) 周围的流动。g /D从 0 到 10 变化，l/D从 0.5 到 10 变化。发现分流板长度对涡流脱落和流体力有很强的影响。在l/D  = 8 时观察到平均阻力系数的最大降低，即上游和下游气缸分别降低 15% 和 78%。在l/D处发现升力系数的均方根值的最大减少 = 10，即 99%。这两个点的流动模式都是稳定流动的。对于l/D  > 5，有 100% 的涡旋脱落抑制。观察到的流过没有分流板的串联圆柱的流动模式是；单钝体 (SBB)、稳态流 (SF)、准稳态流 (QSF)、完全发展流 (FDF) 和完全发展的两排涡街流 (FDTRVS) 状态。在存在分流板的情况下观察到 SBB、QSF 和 SF 体系。