| Author Name | Affiliation | | Cheng Zhang | School of Energy and Power Engineering, Nanjing University of Science and Technology,Nanjing 210094, China | | Huijun Ning | School of civil Engineering, Henan University of Science and Technology,Luoyang 471023 ,Henan, China | | Kun Jiang | School of Energy and Power Engineering, Nanjing University of Science and Technology,Nanjing 210094, China |
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| Abstract: |
| According to the characteristics of fluid-structure interaction(FSI) in the process of metal bellows inflating to disperse bomblets,a 3D dynamical FSI model(W model) which describes the interaction between a viscous compressible flow and a structure undergoing large deformationis established.Then the dynamic characteristics of the metal bellows deformation, the changing law of the internal flow field and the motion law of the bombs are acquired.Where the internal pressure and bombs' moving law are approximate to interior ballistic results, which indicates the W model established reasonably.Besides, considering gaps existing atthe bellows' tow ends, the dynamical FSI modelcontaining gaps(Y model) is also built.The results of the W and Y models are compared and the results show that the existence of the gaps has little influence to the flow field and the stress distributionin the bellows,but obviously reduces the separation speed of the bomblets about 10%. |
| Key words: metal bellows large deformation gap |
| DOI：10.11916/j.issn.1005-9113.2016.02.008 |
| Clc Number:O354; V214.4 |
| Fund: |
