论文标题
3DS稀疏网格产生的湍流的比较不同
A Comparison of Turbulence Generated by 3DS Sparse Grids With Different Blockage Ratios and Different Co-Frame Arrangements
论文作者
论文摘要
一种新型的网格湍流发生器，3D稀疏网格（3DS），是一种共同布置的共同框架，每个框架都包含不同长度的网格元素[Malik，N。A. US No. 9,599,269 B2（2017）]，并拥有比Flat 2d Flact fractal fractal Squart（2d Flactal fractal Squarpf（2d）。使用DNS，我们比较由不同类型的3DS网格产生的湍流（平均流量，湍流强度，能量光谱）的特征。 3DS产生的峰强度可以超过2DF产生的峰值80 \％；我们观察到，阻塞比24 \％的3DS产生的湍流类似于2DF，阻塞比32 \％表示相同湍流的能量输入较低。
A new type of grid turbulence generator, the 3D sparse grid (3DS), is a co-planar arrangement of co-frames each containing a different length scale of grid elements [Malik, N. A. US Patent No. US 9,599,269 B2 (2017)] and possessing a much bigger parameter space than the flat 2D fractal square grid (2DF). Using DNS we compare the characteristics of the turbulence (mean flow, turbulence intensity, energy spectrum) generated by different types of 3DS grids. The peak intensities generated by 3DS can exceed the peaks generated by the 2DF by 80\%; we observe that a 3DS with blockage ratio 24\% produces turbulence similar to the 2DF with blockage ratio 32\% implying lower energy input for the same turbulence.
