Volume 37, Number 1, February 2019
|Page(s)||93 - 99|
|Published online||03 April 2019|
Experimental Study on Morphological Characteristics of Ventilated Supercavity of Double Disc Cavitator Projectile
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
Based on the principle of independence of cavity sections expansion, a double disc cavitator for underwater projectiles is proposed in this paper.The high-speed water tunnel experiment is carried out to study the generation and morphological characteristics of the ventilated supercavity which generated by this series of double disc cavitator.The experiment observed the ventilated supercavity morphology under the different cone angles by changing the ventilation flow coefficient.The experimental results show that there are two kinds of cavitation states:the front disc preferential cavitation and the rear disc preferential cavitation. The transition between these two states occur at a cone angle about 55°.The value of the critical ventilation flow coefficient when generating stable ventilation supercavity has a positive correlation with the cone angle.The front disc and the rear disc of the cavitator have mutual inhibitory effect on the production of ventilated supercavities.And the morphological characteristics of ventilated supercavity do not increase with the increasing of ventilation flow coefficient, but there is an upper limit value of ventilation flow coefficient.
Key words: projectile / double disc cavitator / ventilated supercavity / ventilation flow coefficient / morphological characteristics of supercavity
关键字 : 射弹 / 双圆盘空化器 / 通气超空泡 / 通气流量系数 / 空泡形态特征量
© 2019 Journal of Northwestern Polytechnical University
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