Article
Engineering, Environmental
Wei Zhang, Zongyu Wang, Zhengkai Li, Jifeng Zhang, Chao Chang, Yulong Ji
Summary: A novel DBD reactor with homothermic sodium chloride solution as grounded electrode was designed to solve the issues of metal electrode corrosion and poor discharge uniformity. The effects of NaCl solution conductivity on the electrical parameters, de-NOx performance and optical emission spectrum of DBD were studied experimentally. Numerical simulations and sensitivity analysis of chemical reactions revealed the pathways and mechanism of de-NOx in DBD. The results showed that the best discharge intensity, uniformity, energy consumption and de-NOx performance were achieved at 32mS/cm of NaCl solution conductivity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agronomy
Chun Wang, Yongchao Shao, You Zhang, Zhi Xin, Jian Chen, Weiguo Zhang, Fuzeng Yang
Summary: A comb-type buckwheat-harvesting device was designed and tested in hilly areas and small plots of buckwheat in China. By designing the threshing mechanism and conducting experiments, the optimal parameters for achieving high threshing rate, low breakage rate, and loss rate were determined. The results showed that the speed of the comb teeth had the greatest influence on the performance of the machine.
Article
Automation & Control Systems
Zhenmeng Cui, Liang Han, Guancheng Dong, Yingze Lin, Yangzhen Gao, Shuaishuai Fan
Summary: A novel automatic scraping machine has been designed and tested, which can simulate the shape of manual scraping with high precision. The machine includes a 3-axis motion mechanism, a visual recognition system, a 3-D measurement system, and a control system, enabling quick acquisition of information required for scraping and processing.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Mechanics
Zepeng Liu, Hongxin Zhang, Guoping Huang
Summary: This paper proposes a novel design method for a dynamic distortion simulator to simulate complex distortion flow fields. Experimental results show that circumferential total pressure and swirl distortion can be generated, and the range of the distortion region can be controlled by the position of the rotating valve.
Article
Green & Sustainable Science & Technology
Dimitrios N. Korres, Christos Tzivanidis
Summary: In this study, a novel compound parabolic collector (CPC) with an asymmetric reflector and an evacuated U-pipe tubular receiver was examined both numerically and experimentally. The results demonstrated the accuracy of the numerical model and compared the optical performance of the collector with other designs.
Article
Engineering, Electrical & Electronic
Giacomo Migliore, Antonino Muratore, Alessandro Busacca, Pasquale Cusumano, Salvatore Stivala
Summary: This paper presents a novel configuration for an axial virtual cathode oscillator (Vircator) designed for high-power applications. Through optimizing the radii and distances of the reflectors, the optimized structure achieves high efficiency and output power in the C-band.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Energy & Fuels
D. O. Glushkov, A. G. Kosintsev, G. V. Kuznetsov, V. S. Vysokomorny
Summary: The research investigates the interdependent physical and chemical processes occurring when gel fuel is ignited by a hot particle. The experimental data and numerical simulation results show good agreement, indicating the effectiveness of the developed mathematical model in predicting the ignition characteristics of gel fuel by hot particles.
Article
Construction & Building Technology
Mei Wang, Yu Wang, Lang Liu, Mingli Geng, Xueli Wang, Luyang Qiu
Summary: Based on the similarity theory, this paper conducts a dimensionless analysis of air flow and selects Archimedes number as the similarity criterion to study the cooling effect of mine cold storage backfill under ventilation environment. Both similarity experiment and CFD numerical simulation are used to study the influence of different cooling methods and air supply conditions on the temperature distribution of stope. The results show that cold storage backfill is an effective method to control the temperature in stopes, and the downward backfill method is superior in terms of cooling temperature and duration.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Computer Science, Information Systems
Se-Hoon Kim, Chang-Jin Lee, Wan-Il Kim, Kwang-Cheol Ko
Summary: The experimental investigation of a ring reflector using an axial vircator demonstrated significant enhancement in microwave power output. However, the enhancement decreases with increasing anode to ring reflector distance. Experimental results showed that the vircator with the ring reflector achieved maximum microwave power output at a distance of 18 mm.
Article
Engineering, Electrical & Electronic
Bud Denny, Jason Hammond, Christopher Leach
Summary: The study investigates several configurations of a gigawatt class coaxial triode vircator and presents an optimization process to maximize power output efficiency. Through simulations and optimization methods, a device with an output power of 2.08 GW and an efficiency of 20% was achieved, operating at a steady-state frequency of 4.43 GHz.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Multidisciplinary Sciences
Feng Wang, Yafeng He, Xiaokai Wu, Min Kang
Summary: This paper investigates the application of electrochemical grinding in the processing of stainless steel shaver cap. By establishing a flow field model and conducting experimental research, a better matching effect of dissolution and grinding was achieved. It was also found that inner-jet ECG has potential in the processing of high-hardness stainless steel parts.
SCIENTIFIC REPORTS
(2022)
Article
Computer Science, Information Systems
Se-Hoon Kim, Chang-Jin Lee, Wan-Il Kim, Kwang-Cheol Ko
Summary: The operation features of a coaxial virtual cathode oscillator emitting electrons in the outer radial direction were investigated. It was found that the proposed coaxial vircator generates 80% more microwave power than the axial vircator with the same anode to cathode distance. The proposed coaxial vircator tends to generate a higher average power and lower frequency when the anode to cathode distance is larger.
Article
Engineering, Electrical & Electronic
Lingfeng Sang, Hongbo Wang, Yu Tian
Summary: This paper investigates and designs a novel bilateral patient transfer robot. Through theoretical analysis, mechanical analysis, and experimental research, it is proved that this robot has good performance and comfort, and can effectively reduce the burden on medical staff.
Article
Engineering, Aerospace
Yanxia Lou, Xueqin Bu, Xiaobin Shen, Guiping Lin, Ruchen Zhang, Feixiong Zeng, Haichuan Jin, Kuiyuan Ma, Dongsheng Wen
Summary: The occurrence of aircraft icing can have a significant impact on flight performance. This study focuses on the distribution of overflow water, which is an important aspect in the study of anti-icing technology for aircraft. Experimental and numerical simulations were conducted to accurately predict the location of water film breakup and the characteristics of rivulets. The effects of surface temperature and roughness on water film breakup were also investigated.
Article
Multidisciplinary Sciences
Yawei Mao, Yiwei Wu, Xianghai Yan, Mengnan Liu, Liyou Xu
Summary: This paper proposes a modeling method for an electric tractor drive system, and conducts simulation and testing. The results show that the simulation and testing results are consistent, demonstrating the credibility of the simulation and the correctness of the model.