Experimental Investigation into the Cavity Shape and Pressure Characteristics of Supercavitating Vehicle with Elastic Trailing  Edge

doi:10.3969/j.issn.1000-1093.2020.03.014

Abstract

Abstract: A vehicle model with variable stiffness elastic trailing edge is designed to analyze the influence of elastic trailing edge on the hydrodynamic characteristics of supercavitating vehicles. The cavity shape and the pressure characteristics at different differential pressures and ventilation rates are studied through water tunnel experiment. In the experiment, an industrial camera is used to observe the shape of elastic trailing edge and the flow field, and a dynamic measurement system is used to measure the pressure fluctuation about the feature points. The influence of elastic trailing edge on the hydrodynamic characteristics of supercavitating vehicle is analyzed by comparing the changes of cavity shape and pressure fluctuation. The results show that the deformation of elastic trailing edge increases with the increase in the differential pressure coefficient. When the diameter ratio of the elastic trailing edge to the main body of vehicle is 1.35, the elastic trailing edge has an obvious effect on the cavity shape, and the cavity is closed in front of the trailing edge. Behind the trailing edge, the surface pressure of the model increases with the surface contacting water. With the continuing increase in diameter ratio, a tail cavity appears and fluctuates wildly, which causes the reduction in the wetted area downstream the elastic trailing edge and the drop in surface pressure. Key

Key words: supercavitatingvehicle, elastictrailingedge, cavityshape, pressurecharacteristic, watertunnelexperiment

CLC Number:

TJ630.1

HOU Dongbo， WANG Cong， XIA Weixue， LI Yiguo， ZHAO Jing. Experimental Investigation into the Cavity Shape and Pressure Characteristics of Supercavitating Vehicle with Elastic Trailing Edge[J]. Acta Armamentarii, 2020, 41(3): 534-541.

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第41卷第3期2020 年3月
兵工学报ACTA ARMAMENTARII
Vol.41No.3Mar.2020

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Experimental Investigation into the Cavity Shape and Pressure Characteristics of Supercavitating Vehicle with Elastic Trailing Edge

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