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《Acta Mechanica Sinica》 2004-02
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ON ASYMMETRY OF VENTILATED SUPERCAVITY OF UNDERWATER VEHICLE

Yuan Xulong Zhang Yuwen Wang Yucai Deng Fei Chen Weizheng Dang Jianjun (College of Marine Engineering, Northwestern Polytechnical University, Xi'an 710072, China)  
For all its attracktiveness due to a low hydrodynamic drag,the motion of a supercavitating vehicle in a cavity is a more complicated and paradoxical process than that of space craft.Moving in a vaper-or gas- filled,the cavitating vehicle loses buoyancy——the main advantage of motion in water,and thus need dynamic mean8 to maintan its weight in cavity.To keep the balance and stability of the motion,supercavitating underwater vehicle need asymmetrical supercavitating flow patterns.In order to explore the asymmetrical supercavitating flow patterns,a series of experiments were conducted to investigate asymmetry of ventilated supercavity's configuration.Supercavitation is initiated by ventilating at moderate flow speed.By analyzing and measuring the photos of supercavity under conditions of various Froude number,attack angle of model and cavitator,the relations between supercavity asymmetry and the factors those arose it were found qualitatively and quantitatively.The result indicated that when compound parameterFr2(1+σ)is greater than 50,the asymmetrical deformation caused by gravity is less than 5‰.The asymmetricM supercavitating flow pattern can satisfy the requirement of supercavitating motion of underwater vehicle.
【Fund】: 国防基础;重点实验室基金~~
【CateGory Index】: U661
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