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| Effect of two-phase flow past sphere-conic surface caused by denudation |
| Received:February 16, 2010 Revised:April 22, 2010 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201103011 |
| KeyWord:ablation denudation two-phase flow discrete vortex method |
| Author | Institution |
| 黄海明 |
北京交通大学 工程力学研究所,北京 |
| 徐晓亮 |
北京交通大学 工程力学研究所,北京 |
| 章梓茂 |
北京交通大学 工程力学研究所,北京 |
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| Abstract: |
| Based on multi-disciplinary theory, a numerical model for solving ablation, denudation in a high temperature and high pressure environment is proposed. In this model, the discrete vortex method (DVM) is used in simulating flow field and pressure distribution on the sphere-conic surface; a commonly three-equations model under the thermal-chemical control mechanism is introduced for resolving the ablation loss after compared with the results under the diffusion control mechanism; furthermore, the denudation loss is simplified by releasing a series of particles on the sphere-conic surface at regular intervals, and a trajectory model is adopted for solving the particles motion. Codes are written and performed well for simulating the flow field and particles motion in a high temperature and high pressure blaster chamber. As results indicated, the ablation results in a remarkable effect on the sphere-conic surface and the vortex contour changes to a asymmetric structure; as time goes on, the linear momentum of the ablating sphere-conic surface becomes larger than the non-ablating one. The particles are accumulated at the vortex contour, when the vortex contour turns to an asymmetric structure, the particle traces are no longer symmetric, and the particle distribution will be haphazard. |
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