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首页> 外文会议>AIAA aerospace sciences meeting including the new horizons forum and aerospace exposition >Three Dimensional Active Flow Control Drag Reduction Studies Over a Bluff Body Using a Coupled Lattice Boltzmann-Navier-Stokes Methodology
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Three Dimensional Active Flow Control Drag Reduction Studies Over a Bluff Body Using a Coupled Lattice Boltzmann-Navier-Stokes Methodology

机译：使用耦合格子Boltzmann-Navier-Stokes方法论在钝体上进行三维主动流控制减阻研究

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A coupled Lattice Boltzmann - Navier-Stokes methodology in three dimensions is implemented for modeling flow control phenomena. A one cell overlap between the Lattice Boltzmann (LB) and Navier-Stokes (NS) grids is used to exchange information between the two solvers. Flow over a circular cylinder has been chosen as the case study for the present drag reduction studies. A comparison of the baseline flow over a two-dimensional and three-dimensional cylinder has been performed. The difference in the flow phenomena between the two cases has been examined. The coupled methodology has subsequently been applied to the flow over a 3-D circular cylinder with a synthetic jet device for drag reduction. The LB solver is used to resolve the flow physics at the small length scales in the synthetic jet region and the NS solver is used to model the rest of the flow domain. A drag reduction of 8.5 percent is observed in the synthetic jet case compared to the baseline case without active flow control.
机译：实施了三维耦合的Lattice Boltzmann-Navier-Stokes方法论来对流控制现象进行建模。 Lattice Boltzmann（LB）和Navier-Stokes（NS）网格之间的一个单元重叠用于在两个求解器之间交换信息。在当前的减阻研究中，已经选择了在圆柱上的流动作为案例研究。已对二维圆柱和三维圆柱上的基线流量进行了比较。研究了两种情况下流动现象的差异。随后将耦合方法应用于带有合成射流装置的3-D圆柱体上的流动以减少阻力。 LB求解器用于在合成射流区域中以小长度尺度求解流物理学，而NS求解器用于对其余流域建模。与没有主动流量控制的基线情况相比，在合成射流情况下观察到阻力降低了8.5％。

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