Research On Combined " Arrangement + Morphology" Based Combined Bionic Erosion Resistance

Erosion is a long-term and unavoidable form of wear,which is one of the important factors that seriously endanger the working reliability of machinery equipment.It is an urgent issue that we need to study how to suppress the damage to mechanical equipment by erosion.With the rise of bionic ideas,scholars have linked bionic ideas to erosion resistance.Scholars have used bionic ideas to mitigate the damage caused by erosion.Compared to traditional erosion control methods involving wear-resistant materials,material modification,and surface coatings,bionic erosion resistance offers several distinct advantages such as being eco-friendly,highly efficient,and low in consumption.Consequently,bionic erosion resistance has emerged as a popular area of research in the field of erosion resistance.However,there are still some shortcomings in the present research on bionic erosion resistance.First,the bionic prototype is relatively single.At present,scholars mainly focus on desert organisms and marine organisms for research.Moreover,scholars still have not conducted extensive research on the flexible arrangement of bionic forms on the sample surface.These shortcomings make the theoretical research on bionic erosion resistance progress slowly,and it needs further improvement in the application effect of practical engineering.To this end,for the present problems of bionic erosion resistance,this paper intends to introduce a new bionic prototype in the study of bionic erosion resistance,namely-phyllotaxis arrangement.The newly introduced bionic prototype is able to expand the bionic prototype in the bionic erosion resistance study in this paper.It also solves the problem of arranging the bionic morphology on the sample surface.In the study of bionic erosion resistance,convex morphology is a bionic morphology that is extracted from the surface morphology of organisms such as scorpion and tamarisk which has good erosion resistance.In order to explore the arrangement issue of bionic morphology,this paper combined the phyllotaxis arrangement with convex morphology to construct a new combined bionic erosion resistance model.The research details of this paper are as follows:(1)We conducted a study on the erosion resistance of the combined bionic model in the plane.In this paper,we combine the phyllotaxis arrangement with convex morphology to construct a combined bionic model applicable to the arrangement on a plane.In the erosive environment with the erosive velocity of 30m/s,we placed the combined bionic model at the erosive angles of 30°～90° for the erosion test and numerical simulation analysis respectively.A comparative study from two perspectives of arrangement method and arrangement density shows that the combined bionic model has excellent erosion resistance in the plane.The paper also discusses the area of the protected region generated by the convex morphology and the maximum arrangement spacing that theoretically generates airflow turbulence using mathematical models.(2)We conducted a study on the erosion resistance of the combined bionic model in the ruled surface.We selected two more typical ruled surface as the study objects,namely-inner cylindrical surface and outer cylindrical surface.This paper conducts a comparative study on the erosion resistance of the combined bionic models arranged in straight surfaces from two perspectives,namely,the arrangement method and the arrangement density.In the comparative study of the arrangement methods,we selected two common arrangement methods(uniform arrangement and interlaced arrangement)as a contrast,and found that the leaf sequence arrangement can play a good role in diverting and guiding the erosive fluid.In the comparative study of arrangement densities,we performed the analysis of erosion resistance for the combined bionic models with different arrangement densities and found that there is a positive ratio between the arrangement density of convex morphology and its erosion resistance without overlapping each other.(3)We conducted a study on the erosion resistance of the combined bionic model in the hyperbolic surface.We have chosen the 90° bend,which is more commonly used in engineering,as the object of study.We investigated the effect of the placement position of the combined bionic model in the 90° bend on its performance for erosion resistance.Moreover,we conducted a comparative study on the arrangement method and the arrangement density of the combined bionic model in different placement positons,respectively.From these two comparative studies,we found that it is optimal to arrange the combined bionic model at the inlet of the 90° bend.This paper also discusses the drag problem arising from the arrangement of the combined bionic model in the 90° bend.Finally,we summarize the performances of the combined bionic model for erosion resistance on a variety of surfaces.In response to the conclusions drawn from the erosion study,we propose relevant suggestions for subsequent bionic erosion resistance studies.