Turbulence flows are very interesting topics in both academia and industry community. Although the physics of turbulent flows is still not well understood, one property we can be sure of is the multi-scale nature of turbulent flows. This inspired us to investigate turbulence flows in a pipe with multiscale fractal-shape orifices. It is a challenging problem as it contains scales distributed in a fractal manner and more importantly we can control the fractal interaction and monitor the numerical performance as a function of the problem complexity. Although there are some works [1, 2, 3, 4] on this kind of problem, the numerical simulations on this topic are rare. Most of the numerical results of fractal generated turbulence flow employ the direct numerical simulation [5]. However, the results could only be compared qualitatively with the experiment results [5]. Thus, in this work, we would like to assess the feasibility of studying the turbulence flows after a fractal shape orifice by the detached eddy simulation.