Tests for cavities and motion characteristics in process of&nbsp; two-cylinder in parallel water entry at low speed

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (7) : 42-49.

Tests for cavities and motion characteristics in process of two-cylinder in parallel water entry at low speed

LU Lirui WEI Yingjie WANG Cong SONG Wuchao LIU Kaihang

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Abstract

To deeply study cavities evolution and motion laws in process of two-cylinder in parallel water-entry at low speed,tests for two-cylinder in parallel water-entry at low speed were conducted. The evolution mechanism of in parallel water-entry two-cavity was analyzed by comparing tests for a single cylinder water entry and those for two-cylinder in parallel water entry. The tests with different water-entry velocities were conducted to study the effects of water-entry velocity on cylinders’ motion characteristics in process of them in parallel water-entry. Combined with the evolution law of cavities,the influence mechanism of cavities evolution process on cylinders’ motion was analyzed. The results showed that in process of two-cylinder in parallel water-entry at low speed,cavities have obvious asymmetry; cylinders have lateral motion and excursion one under the asymmetric hydrodynamic action; cavities closure affects cylinders’ excursion motion obviously,the motion characteristic curves of two-cylinder and two-cavity morphology have a good symmetry.

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in parallel / water entry / cavity / motion characteristics

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LU Lirui WEI Yingjie WANG Cong SONG Wuchao LIU Kaihang. Tests for cavities and motion characteristics in process of two-cylinder in parallel water entry at low speed[J]. Journal of Vibration and Shock, 2019, 38(7): 42-49

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