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On-line Access: 2019-10-08

Received: 2019-07-27

Revision Accepted: 2019-09-11

Crosschecked: 2019-09-12

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Zhe-ming Tong

https://orcid.org/0000-0003-1129-7439

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Journal of Zhejiang University SCIENCE A 2019 Vol.20 No.10 P.804-810

http://doi.org/10.1631/jzus.A1900356


Simulation and experiment of a remotely operated underwater vehicle with cavitation jet technology


Author(s):  Jing-ke Hu, Zhe-ming Tong, Jia-ge Xin, Can-jun Yang

Affiliation(s):  State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   tzm@zju.edu.cn

Key Words:  Remotely operated vehicle (ROV), Cavitation jet


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Jing-ke Hu, Zhe-ming Tong, Jia-ge Xin, Can-jun Yang. Simulation and experiment of a remotely operated underwater vehicle with cavitation jet technology[J]. Journal of Zhejiang University Science A, 2019, 20(10): 804-810.

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Abstract: 
Fouling is the attachment and development of unwanted material on artificial surfaces immersed in seawater. The existence of fouling material leads to many economic and ecological problems in the seabed environment. Over the last 10 years, at least 30 bridges have collapsed in China because of the increase of biofouling thickness. It is important to do regular checks on bridges. An underwater check is now a common method throughout the world. Frogmen will dive underwater with tools to carry out the check. Remotely operated vehicles (ROVs) are essential tools for providing safe access underwater. In this study, underwater ROV is used as the platform to realize the cleaning of underwater structures based on cavitation jet cleaning technology.

This paper mainly deals with the simulation of jets and the experiment of cleaning. The authors focus on the application of jet cavitation technology to the ROV. I understand the importance of the subject and recognize their efforts.

基于空化喷射技术的水下机器人射流清洗仿真与实验

目的:污染物质的存在会引起海底环境中的许多经济和生态问题. 本文以遥控无人潜水器(ROV)为基础承载平台,实现基于空化喷射清洗技术的水下结构表面附着物清洗.
创新点:将空化射流清洗技术与ROV结合,并利用空化泡在清洗表面区域溃灭产生的微射流冲击,以达到清理水下表面附着物和污垢层的目的.
方法:1. 通过计算流体动力学(CFD)仿真与实验,针对ROV水下喷射模型,在不同状态和不同参数下对水下射流的规律进行测试与比较. 2. 实验对比验证在不同喷射距离下所设计的空化射流清洗装置清理海底生物的能力.
结论:1. 当入口压力P=30 MPa,孔径d=2 mm,出口长度L=16 mm和出口直径D=16 mm时,水下喷嘴具有更高的清洁度和清洁效率,可以满足清洁要求. 2. ROV喷嘴离水下泥浆越远,冲刷深度越浅. 3. 所设计的ROV空化喷射清洁装置与目标的距离越近,清洗强度越高;然而,当压力恒定且距离太近时,过度阻力会削弱冲洗强度.

关键词:水下喷射;ROV;空化喷射清洁;喷嘴结构

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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