Experimental investigation of ventilated supercavitation behind cone-shaped with different angles and disk-shaped cavitators

Pham, Van-Duyen; Hong, Ji-Woo; Kim, Kiseong; Ahn, Byoung-Kwon

doi:10.1016/j.ijnaoe.2022.100477

Cited by 14 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jiang et al [9], Mohammadrahimi et al [10], and Shao et al [11] independently examined supercavitation vehicle models with different head shapes and concluded that the cone-shaped head design is desirable to form the stable supercavitation. Based on their work, Pham et al [12] tested several models with conical heads of various angles and found that smaller cone angles contribute to the occurrence of supercavitation. After supercavitation occurs, the drag force experienced by the vehicle is substantially reduced.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation of Supercavitation Vehicle’s Hydrodynamic Noise

Ye,

Zhang,

Wang

et al. 2023

JMSE

View full text Add to dashboard Cite

This paper presents the simulation results of the acoustic field around an underwater supercavitation vehicle under various operating conditions and analyzes the cavitation phenomenon and the hydrodynamic noise spectrum. Regarding the ventilated cavitation phenomenon, the simulation shows that low vehicle speed can reduce the threshold of the ventilated supercavitation, and high background pressure can enhance the stability of the supercavitation structure. As for hydrodynamic noise, firstly, the simulation results reveal that when cavitation occurs, the noise spectrum exhibits several characteristic peaks near 1 kHz and between 3 and 10 kHz. The overall noise amplitude demonstrates a descending trend between 10 and 40 kHz. Further, under natural cavitation conditions, a characteristic peak is detectable between 40 and 80 kHz. The influence of the operating conditions on the noise is essentially achieved by altering the scale of the cavitation flow: with the growth of the bubble flow scale, the noise between 3 and 10 kHz first increases and then decreases due to its own pulsation and the masking effect, while the noise between 10 to 40 kHz substantially reduces. On the other hand, if the scale expansion of bubble flow is related to the increase of ventilation flow, the noise amplitude near 1 kHz will increase significantly. These results provide theoretical support for studying the supercavitation vehicles’ noise and applying the ventilated supercavitation technology.

show abstract

Section: Introductionmentioning

confidence: 99%