Experimental Investigation into Impact Load during Oblique Water-entry of a Supercavitating Vehicle at 20°

doi:10.3969/j.issn.1000-1093.2018.06.016

Abstract

Abstract: In order to investigate the impact load characteristics of a supercavitating vehicle with a disk cavitator during oblique water-entry, a series of experiments were carried out at the water-entry angle of 20° . An air cannon is set up to provide the initial velocity of supercavitating vehicle. An inertial measurement unit is embedded at the center of gravity of supercavitating vehicle to record the variation of axial impact load, and the data is extracted and analyzed after the experimental test. A typical research case is set up, and the impact load characteristics varying with time are obtained and described in detail. Subsequently, a series of experiments for different entry speeds and cavitator areas are carried out, and the effects of the influence factors on the impact load characteristics are analyzed. The investigation shows that, when the impact load reaches the peak, the penetration distance is 1.89 times of the diameter of cavitator as a reference dimension, and the resistance coefficient is 1.33 times of that in the steady stage. The resistance coefficient is shown to be independent of entry velocity and cavitator area over a wide range of test conditions. Key

Key words: supercavitatingvehicle, diskcavitator, waterentryexperiment, impactload

CLC Number:

TJ630.1

CHEN Cheng, YUAN Xu-long, DANG Jian-jun, XU Qiang. Experimental Investigation into Impact Load during Oblique Water-entry of a Supercavitating Vehicle at 20°[J]. Acta Armamentarii, 2018, 39(6): 1159-1164.

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第39卷第6期
2018 年6月兵工学报ACTA
ARMAMENTARIIVol.39No.6Jun.2018

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