Research Of Full-waverider Aerodynamic Design Methodology For Hypersonic Vehicles Based On Osculating Waverider Method

Air breathing hypersonic vehicle is of great strategic significance and economic value.One of its key technologies is the integrated design of airframe/inlet.By establishing the axisymmetric basic flowfield of internal and external flow integration,the full-waverider design method can complete the integrated design of airframe/inlet with waverider configuration,and keep the leading-edge waverider characteristics of the forebody and airfoil like components of this configuration,as well as the belly parts outside the lip,which is a waverider design method with good engineering application prospect.However,the full-waverider design method only uses the axial-derived waverider design,and can only design the circular lip inlet,which does not have the design ability of three-dimensional drip-like inlet.This paper introduces the osculating idea into the full-waverider design,and proposes a "osculating full-waverider design method",which expands the inlet design ability of the axial-derived full-waverider design method,and realizes the design of two kinds of three-dimensional drip-like inlet.First of all,the paper introduces the method of characteristic and streamline tracing method used in the osculating full-waverider design,as well as the design and solution process of two typical supersonic flow fields;introduces three kinds of basic flowfields used in the paper,including the curved cone basic flowfield,the full-waverider external channel basic flowfield and the full-waverider internal channel basic flowfield;selects the full-waverider internal channel basic flowfield.Numerical calculation is carried out to verify the correctness of the design of the basic flowfield;the design and verification of two waverider configurations are carried out by selecting the basic flowfield in the full-waverider external channel,which verifies the basic waverider design method used in this paper.Secondly,the design research of waverider based on horizontal profile is carried out: the design of osculating cone waverider and curved cone axial-derived waverider based on horizontal profile is completed,which is an axial-derived waverider with constant horizontal projection shape and adjustable thickness,and a osculating cone waverider with controllable sweep angle and dihedral angle.The influence of thickness,sweep angle and dihedral angle on the aerodynamic performance of waverider is analyzed.Then,based on the input conditions of horizontal profile,a new design method of osculating full-waverider is proposed and established.The position of lip point in the basic flowfield is variable,and the lip point of full-waverider configuration coincides with the lip point of basic flowfield,and then moves forward and backward.The effects of viscosity and different attack angles on the waverider characteristics,inlet performance and aerodynamic performance of the whole configuration are studied.By using the combined profile input,the drip-like inlet is designed in the basic flowfield of the two-dimensional inner channel,the waverider belly is designed by using the osculating flowfield matching,and the waverider wing is designed by the osculating axisymmetric matching.The effects of different attack angles on the performance of the inlet and the aerodynamic performance of the whole configuration are studied.Finally,the paper analyzes and discusses the advantages and disadvantages of the osculating full-waverider design method,and puts forward the follow-up improvement scheme of the osculating full waverider design method.