自然超空泡航行体回转运动数值研究

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Abstract Here, numerical simulation was performed for cavitation shape and hydrodynamic characteristics of a natural super-cavitating vehicle in its maneuver process.Based on Logvinovich’s principle of independent expansion, the theoretical model of its rotating motion under action of centrifugal force and the 3-D numerical calculation model for solving rotating motion of the super-cavitating vehicle were established.By comparing calculation results of these two models, the effectiveness of the numerical simulation method was verified.The numerical simulation method was used to study influence laws of centrifugal force’s “straightening” action on hydrodynamic characteristics of the vehicle in cavitation, and analyze pressure distribution characteristics on the surface of the vehicle at different rotating angular velocities.Results showed that with increase in rotating angular velocity, cavitation axis’s external displacement increases, the centrifugal force’s straightening cavitation action becomes stronger to have greater influence on development of cavitation on both sides of the vehicle’s rotation radius; lift coefficient and moment coefficient present a sinusoidal distribution; when rotating angular velocity is less than 1 rad /s, the generated pitching moment has a “head up” effect on the vehicle; when rotating angular velocity is larger than 1 rad /s, the generated pitching moment has a "head down" effect on the vehicle.

Key words： rotating motion centrifugal force cavitation internal pressure numerical simulation

Received: 08 April 2019 Published: 28 October 2020

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	Articles by authors
	WANG Rui1
	LIU Chuanlong2
	ZHAO Sanfei2
	QI Xiaobin1

Cite this article:

WANG Rui1,LIU Chuanlong2,ZHAO Sanfei2, et al. Numerical simulation for rotating motion of a natural super-cavitating vehicle[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(21): 65-70.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I21/65

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