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| Research on cavitation model of underwater explosion based on phase transition relaxation algorithm |
| Received:April 29, 2021 Revised:June 18, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210429001 |
| KeyWord:multicomponent compressible flow phase transition model underwater explosion riemann solver MUSCL-Hancock scheme |
| Author | Institution |
| 余俊 |
中国船舶科学研究中心, 无锡 |
| 王海坤 |
中国船舶科学研究中心, 无锡 |
| 刘建湖 |
中国船舶科学研究中心, 无锡 |
| 汪俊 |
中国船舶科学研究中心, 无锡 |
| 毛海斌 |
中国船舶科学研究中心, 无锡 |
| 周章涛 |
中国船舶科学研究中心, 无锡 |
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| Abstract: |
| There are a large number of cavitation phenomena in underwater explosion.The generation,evolution and collapse of cavitation play an important influence on the shock wave propagation,explosive bubble movement and structural impact damage.Based on multicomponent compressible flow theory,the thermodynamic-chemical equilibrium mechanism between liquid and vapor phases in metastable state is captured,which considering mass and heat exchange between the two phases.The control equations of the system are solved using a fractional step treatment.The homogenous hyperbolic system is solved by a second order MUSCL-Hancock and HLLC approximate Riemann solver firstly,and then Newton iterative method is used to deal with the phase transition relaxation model.The numerical test results show that this model provides a good ability to capture the phase transition in cavitation.Finally,the model is applied to simulate cavitation near water surface in underwater explosion.It is found that the collapsed pressure peak value of cavitation is about 15% of the shock wave pressure peak value,and the effective action time is more than 2 times of the effective action time of the shock wave.The cavitation phase transition model in this paper can provide an important support for the research of mechanism of underwater explosion cavitation. |
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