Space Debris Reentry Analysis Methods and Tools |
| |
Authors: | Ziniu WU Ruifeng HU Xi QU Xiang WANG Zhe WU[Author vitae] |
| |
Institution: | aSchool of Aerospace, Tsinghua University, Beijing 100084, China;bChina Academy of Space Technology, Beijing 100094, China |
| |
Abstract: | The reentry of uncontrolled spacecraft may be broken into many pieces of debris at an altitude in the range of 75-85 km. The surviving fragments could pose great hazard and risk to ground and people. In recent years, methods and tools for predicting and analyzing debris reentry and ground risk assessment have been studied and developed in National Aeronautics and Space Administration (NASA), European Space Agency (ESA) and other organizations, including the group of the present authors. This paper reviews the current progress on this topic of debris reentry briefly. We outline the Monte Carlo method for uncertainty analysis, breakup prediction, and parameters affecting survivability of debris. The existing analysis tools can be classified into two categories, i.e. the object-oriented and the spacecraft-oriented methods, the latter being more accurate than the first one. The past object-oriented tools include objects of only simple shapes. For more realistic simulation, here we present an object-oriented tool debris reentry and ablation prediction system (DRAPS) developed by the present authors, which introduces new object shapes to 15 types, as well as 51 predefined motions and relevant aerodynamic and aerothermal models. The aerodynamic and aerothermal models in DRAPS are validated using direct simulation Monte Carlo (DSMC) method. |
| |
Keywords: | space debris reentry ablation breakup risk assessment aerodynamics |
本文献已被 CNKI ScienceDirect 等数据库收录! |
|