According to the principle of bionics,a pantograph head with bionic streamline section is proposed.The CFD numerical models of six bow surface structures,namely,rectangular bow,long half arc bow,semi-circular bow,short half arc bow,round pointed bow,and pointed bow,are established.The variation rules of air flow field velocity distribution and pressure distribution of each bow head are studied at 350 km/h,and the effect of the bow head section shape on the flow field is analyzed.The aerodynamic lift and drag coefficients of each bow at different speeds are compared and analyzed,and it is found that the semicircular bow has the best aerodynamic performance.The results show that the semi-circular pantograph head can achieve good drag re-duction effect,and the drag at three speeds is reduced by 76.03％,76.24％and 76.39％respectively.This study can provide a theoretical basis for the structure optimization of the pantograph head.
维普
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