| 船首形状对自由液面水下航行体阻力影响的试验研究（英文） |
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| 作者姓名： | Mehran Javadi Mojtaba Dehghan Manshadi Saeid Kheradmand Mohammad Moonesun |
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| 作者单位： | Department of Mechanical Engineering, Isfahan University of Technology;Department of Mechanical and Aerospace Engineering, Malek Ashtar University of Technology;Department of Marine Science and Ocean Engineering, Malek Ashtar University of Technology;Hydrodynamic Department, National University of Shipbuilding (NUOS) |
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| 摘 要： | In this paper, towing tank experiments are conducted to study the behavior of flow on a model of the underwater vehicle with various shapes of bows, i.e. tango and standard bows in free surface motion tests. The total resistances for different Froude numbers are considered experimentally. The towing tank is equipped with a trolley that can operate in through 0.05–6 m/s speed with ±0.02 m/s accuracy. Furthermore, the study is done on hydrodynamic coefficients i.e. total, residual and friction resistance coefficients, and the results are compared. Finally, the study on flow of wave fields around bows is done and wave filed around two bows are compared. The Froude number interval is between 0.099 and 0.349. Blockage fraction for the model is fixed to 0.005 3. The results showed that the residual resistance of the standard bow in 0.19 to 0.3 Froude number is more than the tango bow in surface motion which causes more total resistance for the submarine. Finally, details of wave generated by the bow are depicted and the effects of flow pattern on resistance drag are discussed.
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| 关 键 词： | underwater vehicle free surface motion bow profile residual resistance towing tank flow assessment Froude number |
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