Study On The Layout Of Jet Hole About Bionic Jet Drag Reduction

Nowadays, it is a new hot issue to apply some special physiological structure ofcreatures to the technology of fluid drag reduction in the field of drag reduction. Bionic jet isone of the technologies based on this kind of physiological structure. It takes the function thatthe shark can produce jet when it breaths as biological prototype, establishes thecorresponding characteristics of the bionic model, then analyses the effects and theories of thedrag reduction in different conditions. There is a very broad application prospects in manyfields, such as aerospace, the range of fire gun, pipeline transportation and underwater vehicle,etc.This paper is mainly based on the perspective of bionic, regards the shark gills as theresearch object, refers to the theory of function bionics and establishes the bionic modelthrough analyzing and simulating the structure of special biological function, then define thelayout and its range of sizes according to the characteristic of shark gill slit and the stressvector diagram of single hole jet in existing bionic jet drag reduction. Then mesh dividing thebionic model reasonably. After researching the numerical simulation methods, turbulentmodels, solving techniques, boundary conditions and initial conditions, select appropriateparameters and conditions that apply to the study background of this paper.Take computers as the numerical simulation platform to analyze the influence of thedifferent factors of layout on the effect of jet drag reduction, then determine the optimallayout size of the jet hole, and process the corresponding experimental model based on someof the simulation models, then take the small drag reduction testing platform as the test bed,and take experiment test with the same flow field conditions as numerical simulation, nextanalyze the experimental data, compare and analyze the difference of the dates betweennumerical simulation and experimental test. Finally, compare the results of the numericalsimulation with platform experiment to analyze the mechanism of the bionic jet surface dragreduction.