Research Of Optimization Methods For Transatmospheric Vehicle Conceptual Design

Transatmospheric vehicle (TAV) is a hotspot in the realm of the world's aerospace technology in the 21st century. This vehicle has particular high altitude and hypersonic flight performance.With the development of economy and technology, TAV will be more and more advanced and perfect, replacing of the 1st general reusable launch vehicle (RLV) in future. TAV takes on lots of advantages such as the cheaper launch expensive, the shorter preparative time and more flexible adaptability of flight duties.The research of TAV will be related with the problem of much subject and technology, which involves the aerodynamic layout, the aerodynamic calefaction, the configution anti-heat and refrigeration of structure, the research of advanced engine, the aerial marerial, the high-octane fuel, and flight control. The technology of TAV will promote the development of high-tech. It will also breach the restriction of traditional launch vehicle. So the research of TAV has strategic significance.In this thesis, conceptual design of TAV and its optimization are researched as emphases. By the analysis of TAV design method in the world, and referring to American's X-34, we introduce a scheme of TAV. Using a design method of Russian, and some other methods, we analyze this type of TAV. We also research methods of optimization in TAV design. All the methods have been translated into FORTRAN program. Using this program, primary flight performances of a TAV are optimized, in the condition of giving restrictions. The results of optimization satisfy to our aim. In the end, the methods are applied in the design of TAV with a fine effect.