Results 71 to 80 of about 271 (131)

A study on L1 adaptive control based operation envelope protection for a supercavitating underwater vehicle [PDF]

, 2018
학위논문 (박사)-- 서울대학교 대학원 : 공과대학 조선해양공학과, 2018. 2. 김용환.초공동 기술은 기존 수중운동체의 속도한계를 극복하기 위한 방안으로 제안된 기술로써 군사선진국을 중심으로 활발히 연구되어왔다. 초공동 상태는 유체의 속도 및 압력 변화로 인해 발생하는 공동이 수중운동체를 완전히 감쌀 수 있을 정도로 발달된 상태이다. 수중운동체 항력의 대부분은 마찰저항에 의한 것으로, 추력을 증가시킴으로써 수중운동체의 속력을 증가시키는 것은 한계가
김선홍
core  

Numerical investigation of the unsteady multiphase flow around a supercavitating vehicle with scarfed gas jets

Applied Ocean Research
To address tail slamming during high-speed water entry, this study proposes an active stabilization method using scarfed gas jets at the tail, enhancing vehicle attitude control through the reactive forces of the jets and the interference it generates ...
Zehui Qu, Yigan Zhang, Yonghao Ye, Baiyan He, Huaping Liu   +4 more
doaj   +1 more source

Experimental and numerical study on flow dynamics and universal characteristics of ventilated supercavities behind different cavitators

International Journal of Naval Architecture and Ocean Engineering
In this study, physical aspects of a ventilated supercavity behind different cavitator geometries such as the hydrodynamic characteristics, distribution of pressure within the cavity, hysteresis phenomenon, and gas leakage mechanism were qualitatively ...
So-Won Jeong, Van-Duyen Pham, Byoung-Kwon Ahn, Bu-Geun Paik   +3 more
doaj   +1 more source

Numerical simulation on the high-speed oblique water entry of twin vehicles in parallel configuration

Zhongguo Jianchuan Yanjiu
ObjectiveTo enhance the combat effectiveness of underwater weapons and improve firing accuracy, this study analyzes the high-speed oblique water-entry characteristics of twin vehicles with truncated cone heads in a parallel configuration.MethodUsing the ...
Fulong SHI, Yu TIAN, Runbo LI, Qiu JIN, Renjie LI, Yida MAO   +5 more
doaj   +1 more source

Correction: Chen et al. Design of a Sliding Mode Controller for Lateral Motion Control of a Supercavitating Vehicle Based on a Radial Basis Function Neural Network Observer. J. Mar. Sci. Eng. 2025, 13, 418

Journal of Marine Science and Engineering
There was an error in the original paper [...]
Shangze Chen, Xinhua Zhao, Xiufen Ye
doaj   +1 more source

Hydrodynamics Analysis on the High-Speed Surface Vehicle with Super-Cavitating Hydrofoils

Journal of Applied Fluid Mechanics, 2018
Expeditiously transferring personnel or cargo between seashores or vessels becomes an imperative requirement in ocean engineering. In this paper a novel high-speed surface vessel which has two symmetrical under-water torpedo-shaped sub-water bodies ...
S. Zhao, M. Xiang, H. Zhou, W. Zhang
doaj  

Configuration Analysis of Supercavitating Vehicles Based on Equivalent Pressure Center Method

, 2011
Based on a detailed modeling of supercavitating flight, the Equivalent Pressure Center (EPC) method is proposed in this paper. To validating the proposed method, both of EPC and integrated moment, which are highly concerned during configuration design ...
Wei Hua Zhang, Zhen Yu Ma, Ming Dong Lin, Min Xiang   +3 more
core   +1 more source

Motion of supercavitating vehicle during underwater speeding-up

, 2015
Приведен анализ процесса разгона подводных суперкавитирующих аппаратов от малой начальной скорости до выхода на маршевый суперкавитационнй режим обтекания. Метод исследования – компьютерное моделирование динамики суперкавитирующих аппаратов.
Савченко, Ю.Н., Семененко, В.Н.   +1 more
core   +1 more source

Analysis of the supercavitating body dynamics and control basing on the G.V.Logvinovich theory

, 2013
Показана эффективность аппроксимационных методов расчета и компьютерного моделирования нестационарных суперкавитационных течений, разработанных на основе теории Г.В.Логвиновича, для исследования задач динамики суперкавитирующих тел.
Семененко, В.Н.
core   +2 more sources

Switching Antiwindup Design on Enlarging the Domain of Attraction for a Supercavitating Vehicle Subject to Actuator Saturation

, 2017
This paper presents a new switching antiwindup compensation design to maximize the domain of attraction for a supercavitating vehicle subject to actuator saturation. The dive-plane dynamics of the vehicle are considered.
Zhang Le, Baochen Qiang
core   +1 more source