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| Influence of Warhead Configuration on the Shape of Bubbles on the Surface of Underwater Projectiles |
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| DOI：10.7643/issn.1672-9242.2022.05.006 |
| KeyWord:warhead configuration underwater projectile micro bubble gas film drag reduction water tunnel test |
| Author | Institution |
| ZHAO Sheng-wei |
National Key Laboratory of Transient Physics,Nanjing , China |
| ZHAO Bo |
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing , China |
| ZHANG Huan-hao |
National Key Laboratory of Transient Physics,Nanjing , China |
| LYU Xu-jian |
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing , China |
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| Abstract: |
| The paper aims to study the effect of warhead configuration on bubbles on the surface of underwater projectiles. Based on a high-speed camera system, a water tunnel test is carried out for underwater projectiles with different warhead configurations, the morphological changes of microbubbles generated by the platform cone warhead under the conditions of different speeds and ventilation pressures, and the morphological changes of microbubbles generated by different warhead configurations under the same speed and ventilation pressure are compared and analyzed, and then the shape of the bubbles is analyzed, as well as the effect of changes on drag reduction efficiency. The experimental results show that compared with the elliptical tip warhead, platform cone warhead is easier to form large bubbles in the leading edge area of the microporous material, which has a better wrapping effect on the projectile, thus improving the drag reduction efficiency. For different warhead configurations, under the same flow rate and ventilation pressure, when the warhead taper is 43.6°, the drag reduction effect is the best. Therefore, it is inferred that there is an optimal taper to maximize the coverage area of the gas film and the best drag reduction effect. |
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