Research on the Trajectory Characteristics of Supercavitating Vehicle Obliquely Entering into Water at Preset Rudder Angle

doi:10.3969/j.issn.1000-1093.2018.09.015

Abstract

Abstract: A series of experiments of supercavitating vehicle at the entry angle of 20° are carried out to investigate the trajectory characteristics of supercavitating vehicle at preset rudder angle during oblique water-entry. An air cannon is set up to provide the initial velocity of supercavitating vehicle. The flow pattern in water-entry cavity is captured by using a high-speed video camera, and the variations of the motion parameters and tail pressure are recorded by using a built-in measuring system. The experimental results of supercavitating vehicle navigating at the preset rudder angles of 0° and 20° are analyzed in detail, and the water-entry trajectory characteristics of supercavitating vehicle are given. The influences of different preset rudder angles on the trajectory are further studied. The experimental results show that the vehicle moves along a straight line in a supercavitation state when the preset rudder angle is 0°; a remarkable tail-slapping phenomenon arises, and the axial force and the normal force increase when the preset rudder angle is 20°, thus causing the trajectory to bend to the surface of the water. The vehicle eventually navigates in the state of double-cavity, with enhancing the trajectory deflection. Increasing the preset rudder angle can improve the deflection ability of the vehicle. Key

Key words: supercavitatingvehicle, presetrudderangle, water-entryexperiment, trajectory, tail-slapping

CLC Number:

TJ630.1

CHEN Cheng， YUAN Xu-long， XING Xiao-lin， DANG Jian-jun. Research on the Trajectory Characteristics of Supercavitating Vehicle Obliquely Entering into Water at Preset Rudder Angle[J]. Acta Armamentarii, 2018, 39(9): 1780-1785.

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第39卷
第9期2018 年9月兵工学报ACTA
ARMAMENTARIIVol.39No.9Sep.2018

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