Results 11 to 20 of about 346,263 (278)

Direct Simulation Monte Carlo Simulation of the Effect of Needle Valve Structures on the Rarefied Flow of Cold Gas Thrusters

Micromachines, 2023
The needle valve, serving as the flow control unit of the thruster system, is a crucial component of the entire thruster. Its performance directly impacts the flow state of the rarefied gas in the micro-nozzle structure of the cold gas micro-thruster ...
Songcai Lu, Xuhui Liu, Xudong Wang, Shurui Zhang, Yusong Yu, Yong Li   +5 more
doaj   +1 more source

Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle

Micromachines, 2023
When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster.
Shurui Zhang, Yong Li, Xudong Wang, Songcai Lu, Yusong Yu, Jun Yang   +5 more
doaj   +1 more source

Numerical study on the influence of geometric parameters on mechanical properties of Tapered Head Grouted Sleeve joints

Case Studies in Construction Materials, 2022
In order to ensure the effectiveness of the Tapered Head Grouted Sleeve (THS) joints and reduce its impact on prefabricated components, three-dimensional numerical analysis models were established based on the large-scale general finite element analysis ...
Jinnan Chen, Chengshun Xu, Hongtao Liu, Zihong Zhang, Xiuli Du   +4 more
doaj   +1 more source

3D numerical investigation on flow boiling characteristics in large length-to-diameter ratio microchannel

Journal of Physics: Conference Series, 2023
Abstract To meet the demand of thermal management with large power and high heat flux in the future engineering applications, more and more attentions have been draw to develop the two-phase microchannel cooling technology. In this work, a three dimensional numerical investigation is performed to study the influence of mass flux and heat
Zhen Huang, Li Chen, Xiaohai Peng, Songchao Wang, Dan Zhao, Changying Zhao, Gang Liu   +6 more
openaire   +1 more source

A unidirectional one-dimensional approach for asphaltene deposition in large length-to-diameter ratios scenarios [PDF]

Journal of Petroleum Science and Engineering, 2018
Abstract Asphaltene deposition in wellbores has been recognized as the cholesterol of petroleum for decades causing billions of dollars in losses to the oil and gas industry every year. This necessitates great efforts in precise and fast forecasting of the production problems induced by asphaltene deposition.
Q. Guan, J.C. Chai, A. Goharzadeh, F.M. Vargas, S.L. Biswal, W.G. Chapman, M. Zhang, Y.F. Yap   +7 more
openaire   +1 more source

Preparation of an Anodic Alumina-Supported Ni Catalyst and Development of a Catalytic Plate Reformer for the Steam Reforming of Methane

Energies, 2023
A plate-type Al/Fe–Cr alloy/Al-clad substrate was used to prepare a sandwich-structured plate-type anodic alumina catalyst by anodization, post-modification treatment, and metal loading. The as-prepared plate-type catalyst was utilized in the design of a
Shan Dong, Yi Lin, Jiajun Hu, Chenglin Gu, Leilin Ding, Xinjian Zhang, Shi Jiang, Yu Guo   +7 more
doaj   +1 more source

Influence of Cavity Width on Attenuation Characteristic of Gas Explosion Wave

Shock and Vibration, 2021
This study aimed to investigate the influence of cavity width on the attenuation characteristic of gas explosion wave. Attenuation mechanism of gas explosion wave through cavity was obtained by numerical simulation.
Dengke Xu, Chaomin Mu, Zhongqing Li, Wenqing Zhang   +3 more
doaj   +1 more source

Inner frictional resistance of super-large-diameter steel pipe piles in sand

Yantu gongcheng xuebao, 2020
In recent years, with the increasing installed capacity of offshore wind power, the super-large-diameter steel pipe pile foundation has been widely applied.
LIU Run , HAN De-qing , LIANG Chao , HAO Xin-tong
doaj   +1 more source

Short-Vessel Occlusion Might Indicate Higher Possibility of Success in Reperfusion following Mechanical Thrombectomy in Acute Middle Cerebral Artery Occlusion

Cerebrovascular Diseases Extra, 2021
Background: The impact of the length of the occluded vessel in acute large-vessel occlusion on successful reperfusion by mechanical thrombectomy remains unclear.
Tomoyuki Yoshihara, Ryuzaburo Kanazawa, Takanori Uchida, Tetsuhiro Higashida, Hidenori Ohbuchi, Naoyuki Arai, Yuichi Takahashi   +6 more
doaj   +1 more source

Methane-air explosion pressures in cylindrical interconnected containers with different dimensions

Emergency Management Science and Technology, 2022
The characteristics of methane-air explosion in interconnected containers with different dimensions are studied in this paper, and the prediction models are established. The explosion apparatus consists of two cylindrical containers and a connecting pipe,
Chendi Lin, Chuipeng Liu, Kai Zhang, Zhirong Wang   +3 more
doaj   +1 more source