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Luca Leporini, Ferhat Yaman, Tommaso Andreussi and Vittorio Giannetti
Hall thrusters are plasma-based devices that have established themselves as one of the most attractive and mature electric propulsion technologies for space applications. These devices often operate in a regime characterized by low frequency, large ampli...
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Angelo Rubino, Stefano Pierini, Sara Rubinetti, Michele Gnesotto and Davide Zanchettin
The Mediterranean Sea is of great and manifold relevance for global oceanic circulation and climate: Mediterranean waters profoundly affect the salinity of the North Atlantic Ocean and hence the global ocean circulation. Ocean motions are forced fundamen...
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Yuwei Cheng, Qian Chen, Xiaofei Niu and Shufeng Cai
Supersonic combustion instability studies are crucial for the future maturation of scramjet engines. In the present paper, the supersonic combustion instability in a strut-based scramjet combustor is investigated through large eddy simulation and dynamic...
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Yuepeng Yan, Xiaoqiang Fan and Bing Xiong
Experiments were conducted in this study to reveal the flow characteristics of a variable cross-section S-shaped isolator, when applying the steady-state back pressure at the isolator outlet. The self-excited oscillation characteristics of the shock trai...
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Xiaosi Li, Kai Pang and Xinyan Li
In this paper, the effects of the geometry of a submerged nozzle on the nozzle damping characteristics are studied numerically. Firstly, the numerical method is verified by the previous experimental data. Then, the mesh sensitivity analysis and the monit...
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Feng Zhang, Hao Tang, Nyatchouba Nsangue Bruno Thierry, Wei Liu, Qiuyang Sun, Meixi Zhu, Can Zhang, Xuhao Guo, Chenxu Shan, Liuxiong Xu and Fuxiang Hu
Codends are the posterior components of trawl nets that collect the catch and play a crucial role in the selectivity process. Due to the accumulation of catch and the variety of catch types, the quality of catch and trawl selectivity can be negatively im...
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Yaowen Zhang, Yechao Liu, Zongwu Xie, Yang Liu, Baoshi Cao and Hong Liu
This study investigates the visual servo control of the space station macro/micro manipulator system. The proposed approach is based on the position-based eye-in-hand visual servo (PBVS) and takes advantage of the hardware sensors to overcome the macro m...
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Alexander V. Cherpakov, Ivan A. Parinov and Rakesh Kumar Haldkar
A computational and experimental approach to modeling oscillations of a new axial-type piezoelectric generator (PEG) with an attached mass and an active base is considered. A pair of cylindrical piezoelements located along the generator axis is used as a...
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Wonjeong Hyun, Jina Kim, Heesang Chae and Changjin Lee
The occurrence of low-frequency instability (LFI) appears to be related to multiple interactions among many complex physical processes, such as vortex shedding, boundary-layer oscillation, and additional combustion in the post-combustion chamber. In this...
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Vittorio Giannetti, Manuel Martín Saravia, Luca Leporini, Simone Camarri and Tommaso Andreussi
One of the main oscillatory modes found ubiquitously in Hall thrusters is the so-called breathing mode. This is recognized as a relatively low-frequency (10?30 kHz), longitudinal oscillation of the discharge current and plasma parameters. In this paper, ...
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