Aerodynamic Shape Optimization Of Hypersonic Vehicle Based On Kriging Surrogate Model

Hypersonic vehicle is one of the symbols to measure the level of the development of a country's science and technology.Because the hypersonic vehicle has the characteristics of fast speed,short reaction time,penetration ability and so on,it has great military value and potential economic value.The aerodynamic performance of aircraft is one of the most basic indicators to evaluate its advantages and disadvantages.How to achieve the premise of ensuring accuracy and improving the efficiency of optimization is always a difficult problem in the design of complex aerodynamic configuration.Therefore,aiming at the problems in aerodynamic layout optimization of aircraft,this paper develops aerodynamic shape optimization design method based on the surrogate model,and develops a calculation method with engineering application value.This paper first introduces the numerical calculation method,including flow control equation and its discrete space and time discretization,boundary conditions and turbulence model;and then introduces the basic content of Kriging surrogate model,using the sample point set up the general process model;after the introduction of the process based on the surrogate model optimized by DIRECT optimization algorithm according to certain rules,the sample space constantly until the segmentation,to meet the design requirements for.Finally,the parameterization design of aircraft configuration is carried out,and the above algorithm is checked and verified.The calculation results show that the method can optimize the aerodynamic configuration of hypersonic vehicle efficiently and accurately,and has wide engineering practical value.