Three-dimensional Reconstruction And Analysis Of Aerodynamic And Stealth Characteristic Of X-51A Hypersonic Vehicle

X-51 A is a typical hypersonic vehicle. In the last flight text, X-51 A broke the flight time record of air-breathing hypersonic vehicles. The study of X-51 A hypersonic vehicle is of great research value. The purpose of this thesis is to reconstruct the 3D model of X-51 A, and analyze its aerodynamic and stealth characteristics.The three dimensional digital model of X-51 A was reconstructed according to reconstruction theory based on multi-angle pictures and engineering drawings. Component characteristics analysis was accomplished. Aerodynamic characteristics parameters of X-51 A have been calculated, such as the lift coefficient, drag coefficient, pitching moment coefficient, and lift-drag ratio while the angle of attack ranging between 0 to 8 degrees. Waverider performance and flow property of forebody and inlet were also been studied. Scattering resource distribution has been analyzed according to the scattering mechanism. Threat analysis of X-51A’s task trajectory has been done. The RCS of X-51 A have been calculated by using MLFMM and PO algorithm. The penetration ability of X-51 A was also analyzed.The analysis results indicate that: the aerodynamic design of X-51 A incarnates the thinking of integrating fuselage and engine design; the waverider performance of X-51 A and the performance of inlet are fine; the stealth ability of overall X-51 A is good; the penetration ability of X-51 A is outstanding because of its high speed and low RCS.