Numerical simulation of dynamic performance of trans-media unmanned vehicle during vertical take-off from water

QIU Lei; ZHENG Chaosheng

doi:10.19693/j.issn.1673-3185.02229

Volume 17 Issue 1

Mar. 2022

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Article Navigation > Chinese Journal of Ship Research > 2022 > 17(1): 51-59

QIU L, ZHENG C S. Numerical simulation of dynamic performance of trans-media unmanned vehicle during vertical take-off from water[J]. Chinese Journal of Ship Research, 2022, 17(1): 51–59 doi: 10.19693/j.issn.1673-3185.02229

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Numerical simulation of dynamic performance of trans-media unmanned vehicle during vertical take-off from water

doi: 10.19693/j.issn.1673-3185.02229

QIU Lei¹,
ZHENG Chaosheng^2
,

1.
Project Management Center of Naval Equipment Department, Beijing 100071, China
2.
National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Center,Wuxi 214082, China

Received Date: 2020-12-17
Rev Recd Date: 2021-04-26

Available Online: 2021-07-08

Publish Date: 2022-03-02

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives This paper aims to study the kinetic and dynamic characteristics of an trans-media unmanned vehicle during vertical take-off from water. Methods Its dynamic performance during the trans-media process from water to air is numerically simulated on the basis of the viscous computational fluid dynamics (CFD) approach combined with the overset grid technique, multiple degrees of freedom and dynamic fluid body interaction (DFBI) motion model. Results The results show that in order to pull the vehicle up, the air propeller rotation speed should be higher than the speed at the same pull force provided by a single propeller. As the main movement of the vehicle is vertically upward, the coupling of the air propeller downwash flow velocity and the fuselage of the vehicle leads to the "quick bowing" phenomenon. Conclusions To ensure smooth take-off, a manual or automatic control program should be added to adjust the tilt angle of the thrusters in real time during the take-off process. This study provides a powerful evaluation method for the optimal design and control of trans-media unmanned vehicle in the future.
- trans-media unmanned vehicle,
- vertical take-off,
- numerical simulation,
- overset grid,
- dynamic fluid body interaction (DFBI)

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