Numerical Study on the Effect of Bionic Fish Scale Structure on Duct Airflow
Based on the RSM model,the drag reduction characteristics of fishscale structures in ducts are investigated by numerical simulation.The drag reduction rates of up-convex fishscale arrangement,up-convex single fishscale arrangement and down-convex single fishscale arrangement in ducts are compared.The results show that the up-convex fishscale arrangement smoothes the ducts compared to the up-convex single fishscale arrangement,which increases the resistance in the ducts.And the down-concave individual fishscale arrangement can be effective in reducing the resistance in the duct.When modifying the depth h(h=1mm,3mm,5mm)of the concave single fishscale row,the row spacing L is unchanged,h=5mm,the best resistance reduction effect,the maximum resistance reduction rate of 2.5%.When the spacing L(L=2cm,2.5cm,3cm)of the concave single fish scale structure is modified and the depth h is unchanged,when L=3cm,it has the best resistance reduction capability for the duct,and the maximum resistance reduction rate is 2.8%.
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