Research On Aerodynamic Design Approach For A Waverider With A Full-speed Range Based On The Osculating Cone Theory

With the advent of hypersonic vehicle era,the development of a new generation of space-to-ground shuttle vehicles-“aerospace shuttle”-has gradually become a hot issue in the development of aerospace technology.This kind of aircraft is required to have as high as possible sub-/span-/super-/hypersonic lift-drag ratio.The aerodynamic shape of designed in the traditional single speed domain can not meet the requirements,so it is urgent to design the aerodynamic shape layout suitable for flying in the wide speed domain.At the same time,the configuration of the waverider is more promising than traditional hypersonic aircraft,and is considered to be the most promising hypersonic aircraft configuration.The waverider has the advantages of high lift-to-drag ratio,simple design process and convenient parameterized design,but also has defects such as poor aerodynamic performance under non-design conditions.Therefore,in order to meet the actual development needs,based on the design theory of the waverider,it is necessary to develop aerodynamic shape design of the new wide-speed range aircraft.In this paper,the various design schemes of a waverider with a wide speed range proposed at home and abroad are reviewed in detail,and the advantages and disadvantages of each design scheme are also analyzed.And the various design schemes described above were classified.On this basis,the possible development direction of the waverider with a wide speed range is proposed by referring to the development characteristics of the aerodynamic characteristics of the aircraft.Subsequently,in order to facilitate the research of a waverider with a wide speed range design theory,this paper introduces the design idea and design steps of osculating cone method in detail based on the design principle of cone derived waverider.And the numerical simulation method used in this paper is introduced and verified.Then,taking cone derived waveriders design method as an example,the design idea of variable Mach number waveriders is introduced,and the design steps of cone derived varied Mach number waveriders are given in detail.On this basis,considering the inherent defects of cone derived waveriders,this paper combines the Osculating Cones Method with the design idea of varied Mach number waveriders,proposes the design method of Osculating Cones varied Mach number waveriders,and gives its design steps.Furthermore,considering the improvement of the aerodynamic performance of the aircraft by the swept wing,this paper proposes the design method of the Osculating cone vortex lift waverider with a wide speed range by adjusting the design curve in the waveriders,and gives its detailed design constraints.Its main purpose is to combine the riding characteristics of the waverider at high speed with the vortex lift characteristics at low speed,and hope to further improve the flight performance of the waveriders in wider speed range and larger space.Finally,after a detailed introduction to the aerodynamic performance comparison analysis strategy adopted in this paper,the advantages of the high and low speed aerodynamic performance of the two types of wide-speed range waveriders proposed in this paper are analyzed,and the causes of the difference in aerodynamic performance are discussed.And some valuable conclusions were obtained.