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Study on the Preprocessing of Rapid Computation of Aerodynamic Heating for Hypersonic Aircrafts

Author: GaoYang
Tutor: HanDong
School: Nanjing University of Aeronautics and Astronautics
Course: Aerospace Propulsion Theory and Engineering
Keywords: Preprocessing Initial Graphics Exchange Specification Non-uniform rational B-spline Geometry reconstructed Mesh generation
CLC: V221
Type: Master's thesis
Year: 2008
Downloads: 178
Quote: 1
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Abstract


With CAD in a wide range of applications in engineering , CAD output description of the geometry data converted into the CFD calculations are based on the geometry of the data has become an urgent problem . In this paper, the research group project based on IGES hypersonic vehicle aerodynamic heating quick calculation study , carried out a number of important issues on which one of the key technologies of pre-processing technology research . First, the systematic analysis of the the complex shape pre- processing technology development status at home and abroad , classify and organize , clear research programs in line with current trends , that is based on the data information extracted from the IGES file preprocessing programs . Analysis of the IGES file overall organizational structure, the role of the various parts , and the linkages between them , analyzed data encapsulation principle of geometric information in the data file , the appropriate data storage structure , the process of extracting data information . On this basis , the design the IGES data interface , the IGES file data extraction and conversion . Analysis of the mathematical principles of NURBES method , to common surface model in the IGES discrete reconstructed . IGES surface models to study the surface and the plane intersection algorithm . And based geometry processing data , the head and body of the mesh generation method according to the characteristics of the flow field around and numerical simulation of supersonic aircraft requirements , a preliminary study . Overall , this study has been the pre- processing method based on a data information extracted from the IGES file . And to extract an aircraft model data , for example , the completion of the surface reconstruction , the geometric triangulation and mesh generation . The results show that this method successfully solve the data into the geometry of the CAD output description CFD calculations are based on the geometry data . Complex shape design of the aircraft , the method has broad application prospects , able to meet the needs of the engineering design , hypersonic aerodynamic heating fast computing systems \

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CLC: > Aviation, aerospace > Aviation > Aircraft Construction and Design > Overall design
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