Optimization of the 2D Hypersonic Inlet Based on Response Surface Model

The response surface model of 2D hypersonic inlet was built in the paper,and the design matrix of sample data point which are used in model was created by Latin Hypercubes Design of Experiment(DOE) procedure,then sample data were obtained by inlet flowfield calculation using computational fluid dynamics(CFD) method based on 2D viscous Navier-Stokes equation.Using the inlet response surface model,multi-object optimization of inlet flowpath was implemented.The total pressure recover coefficient,Flow mass coefficient and Rise rate of pressure of optimal inlet is increased,and Drag coefficient is also increased.The performance of optimized inlet is improved remarkably in general.As a result,this optimization strategy based on response surface can satisfy the requirement for precision and cost of calculation during inlet optimization.As a assistant tool for model and optimization,the multidisciplinary design optimization(MDO)software framework iSIGHT is used,which increases realization efficiency of optimization.