Hypersonic vehicles,which flight at Mach numbers greater than 5,will serve as a more convenient and efficient transport tool than present subsonic airplanes for long-distance journeys in future.Typically,it only takes a couple of hours from Beijing to New York at hypersonic speed.Recent interest in these vehicles has grown intensively,and various types of innovative designs have been proposed and studied.Despite entering the age of hypersonic flight,there still exist many problems to resolve [1-4].How to design an advanced aerodynamic configuration is one of them [5].