Debris generated by spacecraft breakup enters the atmosphere with ablation due to hypersonic aerodynamic heating. The survived fragments would pose great risks to the ground and people. This study aims at developing a debris reentry and ablation prediction system (DRAPS) for rapid prediction of spacecraft and debris reentry and ablation. A three degree of freedom (3DOF) ballistic model is used for predicting the spacecraft and debris trajectories. The Newtonian flow theory, collisionless molecular kinetic theory and bridging method are adopted respectively for aerodynamic and aerothermodynamic prediction in the hypersonic continuum flow region, the free molecular flow region and the transitional flow region. A zero or one dimensional heat conduction model is established for ablation analysis, and several breakup models are built concerning the ablation effect. The capability and accuracy of the current software are similar to other existing debris reentry prediction tools. However, the present tool integrates more physical breakup models and can be used for debris with more complex shapes.
HU Ruifeng, WU Ziniu, QU Xi, WANG Xiang
. Debris Reentry and Ablation Prediction and Ground Risk Assessment Software System[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(3)
: 390
-399
.
DOI: CNKI:11-1929/V.20101229.1628.004
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