Numerical Study Of Bionic Surface For Drag Reduction

Drag reduction is a hot topic in today’s society.In many drag reduction technology, bionic surface drag-reducing technology for its long history, low cost, easy to implement, effective, and high development value, becomes the most popular drag reduction technology. Grooves and pits drag reduction technology are representative of the bionic drag reduction technology.Now these two drag reduction technology has been applied to the aerospace, aviation, pipeline transportation, sports competitions and other areas. This paper reviews the international drag reduction in research and technology status, focuses on the development of bionic surface technology and applications, discusses the possibily factors of drag reduction caused by biomimetic surface, on the basis of modern theories of turbulent boundary layer structure and turbulent burst.In this paper, the author uses computational fluid dynamics software to The authors used computational fluid dynamics software to simulate the turbulent boundary layer of the grooves and pits surface. By changing the Reynolds number and structure of the trench, in fully developed turbulence conditions, the drag reduction effect of the impact of a variety of factors groove, and with the theoretical values and experimental values were compared verified, analyzed a variety of conditions the shear stress, velocity, and turbulent kinetic energy, and the first production from the vortex structure, development and demise of the concept of development, the structure of the vortex drag reduction performance of the trench.In addition, this paper has the structure of the underwater crater a numerical study on the drag reduction mechanism.,and lattice optimized pit design.Completed papers bionic surface drag reduction and its mechanism of numerical calculation, it will carry out further research in this area, with some reference and guide.