Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Bruce V. Johnson"'
Publikováno v:
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges ISBN: 9781315189390
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a363b2fe973cc31c61d399aba624070e
https://doi.org/10.1201/9781315189390-9
https://doi.org/10.1201/9781315189390-9
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 2360:45-51
A study of performance measures for bridge preservation is presented. The performance measures use National Bridge Inventory general condition ratings, element-level condition states, and average costs to identify which bridges to preserve, determine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21bf9b10669ee5420056c6bb5acf12c6
https://doi.org/10.3141/2360-06
https://doi.org/10.3141/2360-06
Autor:
Joseph P. Charbonneau, Bruce V. Johnson, Bala Sivakumar, Jonathan W. Rooper, Christopher Higgins, Jordan Pelphrey, Bert H. Hartman, Richard L. Groff
Publikováno v:
Journal of Bridge Engineering. 13:339-350
The LRFR Manual, within commentary Article C6.4.4.2.3, contains provisions for development of site-specific live load factors. In Oregon, truck weigh-in-motion (WIM) data were used to develop live load factors for use on state-owned bridges. The fact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09bdb38c4dc2bc92d517c36e0ec5e75c
https://doi.org/10.1061/(asce)1084-0702(2008)13:4(339)
https://doi.org/10.1061/(asce)1084-0702(2008)13:4(339)
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 128:118-127
Previous heat transfer experiments showed that significant differences in the flow and heat transfer characteristics can occur in models of aircraft gas-turbine, high-compressor drums. Experiments with heated disks and colder flow show large-scale in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b273a95877aa24c25f9e1edc436f41b6
https://doi.org/10.1115/1.1925648
https://doi.org/10.1115/1.1925648
Publikováno v:
Journal of Turbomachinery. 136
Numerical simulations of turbine rim seal experiments are conducted with a time-dependent, 360 deg computational fluid dynamics (CFD) model of the complete turbine stage with a rim seal and cavity to increase understanding of the rim seal ingestion p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e408d540149ada7d58e65aa933da652
https://doi.org/10.1115/1.4024684
https://doi.org/10.1115/1.4024684
Autor:
Cheng-Zhang Wang, Senthil Prasad Mathiyalagan, Bruce V. Johnson, J. Axel Glahn, David F. Cloud
Publikováno v:
Volume 4: Heat Transfer, Parts A and B.
Numerical simulations of turbine rim seal experiments are conducted with a time-dependent, 360-degree CFD model of the complete turbine stage with a rim seal and cavity. The turbine stage has 22 vanes and 28 blades and is modeled with a uniform flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54154fc4f1e7ceb79dca69bf9bdf156d
https://doi.org/10.1115/gt2012-68193
https://doi.org/10.1115/gt2012-68193
Autor:
Bruce V. Johnson
Publikováno v:
Encyclopedia of Aerospace Engineering
The internal air and lubrication systems of gas turbines are described. The internal air system of a gas turbine distributes the air extracted from the main gas path at several axial locations in the compressors to ventilate and cool the engine compo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a94795168cd9e93e9ac12d8be7365249
https://doi.org/10.1002/9780470686652.eae094
https://doi.org/10.1002/9780470686652.eae094
Publikováno v:
Volume 4: Heat Transfer, Parts A and B.
Rim seal ingestion models for gas turbines are formulated to estimate the amount of hot fluid ingested through “clearance” seals into the disk cavity. Previous numerical and experimental studies showed the complex time-dependent, three-dimensiona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45771996e4d0f33f0fd375aebd907d79
https://doi.org/10.1115/gt2008-50650
https://doi.org/10.1115/gt2008-50650
Publikováno v:
Volume 4: Turbo Expo 2007, Parts A and B.
3D unsteady computational fluid dynamics analyses were performed for both close-spaced and wide-spaced turbine stages with axial gap seals and a cavity. Turbine stages, with airfoil configurations similar to those previously studied at United Technol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a89e33e4f7e86424806731d8b6467b20
https://doi.org/10.1115/gt2007-27909
https://doi.org/10.1115/gt2007-27909
Publikováno v:
Volume 3: Heat Transfer, Parts A and B.
A method of estimating the turbine rim seal ingestion rates was developed using the time-dependent pressure distributions on the hub of turbines and a simple-orifice model. Previous methods use the time-averaged pressure distribution downstream of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e992e52bce2c0bcd74e5d982adb70072
https://doi.org/10.1115/gt2006-90853
https://doi.org/10.1115/gt2006-90853