http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Yangwei Wang (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Hao Wang,Jiahao Zhao,Honglin Li,Zhifeng Huang,Yangwei Wang,Qiang Shen,Fei Chen 대한금속·재료학회 2024 METALS AND MATERIALS International Vol.30 No.1
Fabricating porous active metals through chemical dealloying poses challenges due to their reactivity and vulnerability tooxidation in aqueous solutions. The objective of this study was to create micron-sized porous Ti alloy by utilizing the Ti–Mo system as a precursor alloy for chemical dealloying. The impact of phase composition and initial microstructure of theprecursor alloys (Tix at% Mo100 − x at%, x = 60 ~ 70) on the morphology of the resulting porous Ti alloy was systematicallyinvestigated. To improve the mechanical strength and minimize oxidized phases during the dealloying process, a molten saltelectrolysis (MSE) method was employed. The strengthening mechanism of MSE on porous Ti alloys encompassed three keyaspects. Firstly, it effectively reduced the presence of oxidized phases, thereby eliminating surface defects. Secondly, MSEfacilitated grain growth and eliminated voids and cracks at the grain boundaries, leading to enhanced mechanical properties. Thirdly, the involvement of a secondary phase contributed to the overall strengthening mechanism. Following MSE treatment,the oxygen content in the porous Ti alloy decreased from over 13 to 5 at%, and needle-like nanocrystalline β-Ti precipitatesformed within the ligament structure. The accumulation and aggregation of compression-induced dislocations at the grainboundaries of the precipitated phase further improved the mechanical properties. In summary, this work presents an innovativeapproach to fabricating porous Ti alloy with low oxygen content, high strength, and adjustable microstructure. It elucidatesthe strength enhancement mechanism by MSE, providing insights for future materials development and applications.
-
Naian Wang,Dan Luo,Yujing Wu,Yangwei Zhou,Dange Guo,Diangui Huang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.3
Surge and blockage are relatively common problems in compressors. To improve the aerodynamic performance of the compressor and expand the range of stable operating conditions, this paper proposes a new passive control method to improve the internal flow field of the compressor by adding tiny flat plates near the leading edge of blades. The effect of the tiny plate and its placement on the transonic compressor (NASA Rotor 37) was investigated by numerical simulations. The results show that, in the range of operating conditions studied in this paper, this passive control method, which puts the micro-plate at the leading edge of the blade, will form a micro-acceleration channel that can effectively reduce the flow separation in the suction surface of the blade. Although this makes the adiabatic efficiency of the compressor slightly decrease (the absolute reduction value is about 2 %), but it improves the blocking flow of the compressor (about 2 % increase), reduces the surge flow (about 4.9 % decrease) and also improves the pressure ratio of the compressor. Thus, this passive flow control method can effectively expand the range of stable operating conditions of the compressor, with certain theoretical and practical research value.
-
Zhaolong Lia,Baocheng Xie,Yangwei Wang 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.12
Electrochemical machining (ECM) of holes on the surface of nickel-based alloy as tool electrode was investigated to analyze the effect of electric field distribution on hole forming process in ECM of small holes. Based on the experimental and simulation results, it was shown that the law of electric field distribution in electrochemical machining gap with tubular electrode and the effect of gap electric field on dimension of hole were illustrated. In addition, the influences of electrolyte pressure on electric field distribution and stability of machining was studied to conclude the effective factors of machining stability in ECM of holes.
-
Yang Wei,Wang Dan,Guo Jingming,Zhang Yijiao,Zhang Jiajia,Bian Zhaoyuan 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1
Mobile energy storage spatially and temporally transports electric energy and has fexible dispatching, and it has the potential to improve the reliability of distribution networks. In this paper, we studied the reliability assessment of the distribution network with power exchange from mobile energy storage units, considering the coupling diferences among diferent time and zones of the vehicle–road–network system. First, we constructed a basic mobile energy storage operation framework that supports the distribution network reliability. Next, we proposed a quantitative model to describe the dynamic zonal coupled vehicle–road–network system. Based on this model, the corresponding charging and discharging scheduling strategies for diferent mobile energy storage units are well designed to improve the efciency of power support. Then, we provided a distribution network reliability assessment algorithm handling the power exchange from mobile energy storage units. Finally, we used the IEEE 33-node example system to clarify the necessity of the vehicle–road–network model in accounting for dynamic zonal coupling. We also analyzed the impact of diferent characteristics of mobile energy storage on the reliability of the distribution network, and verifed that one can improve the distribution network reliability by increasing the response speed, power capacity, or charging/discharging power of mobile energy storage vehicles.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
