Large-scale source term modelling of vortex generation
Large-scale source term modelling of vortex generation
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DOI：
10.2514/6.2009-3951
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Christopher D. Booker;Xin Zhang;Sergei Chernyshenko
中科院分区：
文献类型：
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作者：
Christopher D. Booker;Xin Zhang;Sergei Chernyshenko
研究了计算流体力学中不对涡流发生装置进行网格划分的涡流发生模型的建立方法。这是通过将源项添加到控制方程中以创建涡流来完成的。在这一领域以前的工作集中在边界层控制。这项研究着眼于更大规模的应用，例如使用涡流增强力。两种不同的方法进行了测试。一种是直接模拟涡流发生器，使用现有的方法，即用源项代替涡流发生器施加在流体上的力。也是这种类型，一个简单的浸入边界法用于比较。另一种方法使用源项来创建指定的涡速度剖面。一种方法来添加一个连续的三维速度制定和实施的三种方式;显式计算所需的力量从Navier-Stokes方程，直接强迫（设置速度作为边界条件），和惩罚型反馈强迫。经过基本测试，所有的方法都应用于一个实际的工程案例使用商业求解器。
Methods of modeling vortex generation in computational fluid dynamics without meshing the vortex generating device have been investigated. This is done by adding source terms to the governing equations to create vortices. Previous work in this area has focused on boundary layer control. This study looks at larger scale applications, such as using vortices for force enhancement. Two different approaches are tested. One is to model vortex generators directly, for which an existing method that replaces the force exerted on the fluid by a vortex generator with a source term is used. Also of this type, a simple immersed boundary method is used for comparison. The other approach uses source terms to create specified vortex velocity profiles. A method to add a continuous three-dimensional velocity is formulated and implemented in three ways; explicit calculation of the required forces from the Navier-Stokes equations, direct forcing (setting the velocity as boundary conditions), and penalty-type feedback forcing. After basic testing, all methods are applied in a practical engineering case using a commercial solver.