In consideration of the problem of a flow field of a bionic jet surface and based on the bionic theory of the non-smooth surface the drag reduction, the jet characteristics in the shark gill area were studied, and a bionic surface model and extensible model were built. Using the turbulence model of shear-stress transport SST k-ω, the numerical simulation of a bionic jet surface model was completed. When the main flow field speed was 20 m/s, the influence of different diameters of the jet hole coupled with different jet speeds on the frictional resistance, differential pressure resistance and drag reduction ratio was analyzed. Furthermore, the drag reduction mechanism of a bionic jet surface was also studied. The results show that the average drag reduction rate reaches the maximum of 11, 566% when the jet aperture is 5mm with the jet velocity conjugated in a coupling format, laying the foundation for the research of drag reduction characteristics in the case of bionic jet surface multi-factor coupling.%针对仿生射流表面流场问题,基于非光滑表面减阻的仿生学理论,对鲨鱼鳃裂部位射流特征进行分析研究,建立具有类似于鲨鱼腮裂部位射流特征的仿生射流表面模型及可拓模型.利用SST k-ω湍流模型对仿生射流表面模型进行数值模拟,在主流场速度为20 m/s时,分析了不同射流孔径与不同射流速度耦合情况对壁面摩擦阻力、压差阻力及减阻率的影响,并对仿生射流表面减阻机理进行分析.研究表明在射流孔为5 mm时与射流速度耦合情况下的平均减阻率最大,为11.566％,同时为仿生射流表面多因素耦合情况下的减阻特性研究奠定基础.
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