Numerical simulation of the drag reduction characteristics of a bionic jet surface aperture coupled with jet speed

作者：Zhao, Gang; Gu, Yunqing^*; Zhao, Hualin; Xia, Donglai; Yao, Jianjun

来源：Journal of Harbin Engineering University, 2012, 33(8): 1001-1007.

DOI：10.3969/j.issn.1006-7043.201105068

• Bionic jet surfaces
• Differential pressures
• Drag reduction mechanism
• Drag reduction ratio
• Drag-reduction rate
• Friction resistance
• Frictional resistance
• Shear-stress transport

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.

• 出版日期2012
• 单位哈尔滨工程大学