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The three dimensional near wake flow topology behind a blunt trailing edge flat plate is
investigated for a Reynolds number range varying from 500 to 4.6x104 using a combination of
flow visualization, numerical simulations and experiments. The secondary wake instabilities are
identified using vorticity maps from CFD and performing Proper Orthogonal Decomposition
(POD) on PIV data from experiments to identify the underlying dominant coherent structures.
These structures are found to appear at a spanwise spacing ranging from 2.2 to 4.8. At higher
Reynolds numbers the secondary wake instabilities appear to be unsteady in space and time.
FlowMaster High-Speed 系统为流体动力学分析提供了新的研究手段。它同时提供了基于数字PIV的空间流场信息和每一点随时间的演化信息。
测试系统功能和性能指标:
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