开槽扰流片流动特性研究

Flow Characteristics of Flaps with Slots in Boundary Layers

用标准的k-ε湍流方程结合近壁流动的两层带状模型,在非结构网格上采用SIMPLE算法,对不同开孔度的开槽扰流片流动特性进行了数值模拟,并和测压实验结果进行了比较.结果表明开槽扰流片的流动结构取决于上下两部分流场的相互耦合作用,开孔度η=50%时两个流场互相没有干扰,开孔度η=20%,30%时两个流场相互耦合作用很强,扰流片后有较大的回流区以及较小的湍流动能.

The flow characteristics of various flaps with slots is studied by solving the Reynolds averaged NavierStokes equations with twolayer zonal model,while the pressure distribution is measured by experiments.The results reveal that the flow structure of flaps with slots depends on the interaction of flows around two parts of the flaps with slots.The two flows have no intervention at porosity η=50%;but they interact stronly at η=20%,30%.The circulation zone downstream of the flaps becomes larger and has weaker turbulent intensity.