Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Dongjiang Han"'
Publikováno v:
Lubricants, Vol 12, Iss 5, p 151 (2024)
Gas bearings have the advantages of small friction loss, wide applicable speed range, no pollution, etc., and have important application prospects in micro and small high-speed rotating machinery. However, due to its compressibility and low viscosity
Externí odkaz:
https://doaj.org/article/62273380369648f19266a7f6a9104f48
Autor:
Weiqi Shen, Dongjiang Han, Tomoko Hirayama, Naoki Yamashita, Tadashi Oshio, Hideo Tsuneoka, Kazuo Tagawa, Kazuhiro Yagishita
Publikováno v:
Tribology Online, Vol 17, Iss 3, Pp 216-226 (2022)
The friction coefficient when a Fe surface was lubricated with an additive mixture of N-Oleoyl sarcosine (NOS), a commercial organic friction modifier, and zinc dialkyldithiophosphate (ZDDP) was measured at 100°C using a ball-on-disk tribometer unde
Externí odkaz:
https://doaj.org/article/35a9688a6f944ef0b8268c746bf65a4a
Autor:
Weiqi Shen, Dongjiang Han, Tomoko Hirayama, Naoki Yamashita, Tadashi Oshio, Hideo Tsuneoka, Kazuo Tagawa, Kazuhiro Yagishita
Publikováno v:
Tribology Online, Vol 17, Iss 3, Pp 227-238 (2022)
The tribological properties of a mixture of a commercial organic friction modifier, N-oleoyl sarcosine (NOS), and a commercial anti-wear additive, zinc dialkyldithiophosphate (ZDDP), were investigated. The results suggest a synergistic effect between
Externí odkaz:
https://doaj.org/article/e4287eb39933418c9261317bbf8838dc
Publikováno v:
发电技术, Vol 42, Iss 4, Pp 509-516 (2021)
The superheat degree of steam extraction is high in the ultra-supercritical single reheat unit. It results in largely irreversible loss and poor system perfection. The thermodynamic performance of the MAST CYCLE thermodynamic system was analyzed, whi
Externí odkaz:
https://doaj.org/article/2abe86b8a6dd4c57a2d326b13b3454e4
Publikováno v:
发电技术, Vol 40, Iss 6, Pp 555-563 (2019)
According to the basic principle of the irreversible thermodynamic cycle value, the irreversible process of the thermodynamic cycle system was analyzed. The concept of "equivalent Carnot cycle efficiency" was proposed, and the classical thermodynamic
Externí odkaz:
https://doaj.org/article/674849b96520403094f1caf170179c1e
Publikováno v:
Journal of Low Frequency Noise, Vibration and Active Control, Vol 40 (2021)
Gas bearings are widely used in micro- and small turbomachinery. Because of the pursuit of high efficiency, turbomachinery adopts small clearance of rotor and stator. The gas bearing rotor system easily suffers from rub impact due to the inherently l
Externí odkaz:
https://doaj.org/article/f200190b41974f27a9f21814cfd088a2
Autor:
Dongjiang Han, Chunxiao Bi
Publikováno v:
Lubricants, Vol 10, Iss 11, p 307 (2022)
Supercritical CO2 foil bearings are promising bearing technology for supercritical CO2 high-speed turbomachinery. The partial derivative method including complete variable perturbation of the compressible turbulent lubrication Reynolds equation is ef
Externí odkaz:
https://doaj.org/article/0be4e1ca6a95485d89854ba08f0c951e
Publikováno v:
Applied Sciences, Vol 12, Iss 13, p 6348 (2022)
Tilting pad bearings are appropriate for the trend of high efficiency and reliability design of rotating machinery due to their high stability. The laminar and turbulent flow states exist in the lubricating oil film of high-speed and heavy-load tilti
Externí odkaz:
https://doaj.org/article/1d5b23d7b9414d218a057020de450c0d
Publikováno v:
Shock and Vibration, Vol 2018 (2018)
Parameters optimization in the critical speed region has the important influence on operational stability of an air cycle machine. Effects of bearing stiffness and unbalanced exciting force on critical speed and response characteristics are investiga
Externí odkaz:
https://doaj.org/article/4813da34b3114ccb814a4c5f40db96fd
Publikováno v:
Wireless Communications and Mobile Computing.
Nuclear power plant (NPP) is a highly complex engineering system which has typical internal feedback and strong component coupling. With these features, most NPP systems have high risk of radioactive release, which makes it essential to perform fault
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b7c42ef18fbfd72bd81a650f20980d0