Zobrazeno 1 - 10
of 119
pro vyhledávání: '"John M. Vance"'
Autor:
John M. Vance, Bugra Han Ertas
Publikováno v:
Journal of Tribology. 129:365-374
The objective of the following work was to determine frequency-dependent rotordynamic force coefficients for a new annular gas damper seal design. Both rotating and nonrotating experimental tests are presented for inlet pressures at 1000psig(69bar),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77a6344d2153eb929b3bea95770ce5fb
https://doi.org/10.1115/1.2464138
https://doi.org/10.1115/1.2464138
Publikováno v:
Journal of Turbomachinery. 129:826-834
The turbomachinery component of interest in this paper, the pocket damper seal, has the dual purpose of limiting leakage and providing an additional source of damping at the seal location. The rotordynamic coefficients of these seals (primarily the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bbbe2eeecd061b8c8f1a440b521d667
https://doi.org/10.1115/1.2720871
https://doi.org/10.1115/1.2720871
Publikováno v:
Journal of Turbomachinery. 128:725-737
This paper presents measured frequency dependent stiffness and damping coefficients for 12-bladed and 8-bladed pocket damper seals (PDS) subdivided into four different seal configurations. Rotating experimental tests are presented for inlet pressures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5071bc3650ad51326f0251ab7694fad4
https://doi.org/10.1115/1.2221327
https://doi.org/10.1115/1.2221327
Autor:
John M. Vance, Bugra Han Ertas
Publikováno v:
Journal of Propulsion and Power. 20:634-647
The primary objective was to determine, through experimental testing and rotordynamic computer simulations, the radial stiffness of an angular contact ball bearing with inner race static misalignment and outer race dynamic misalignment under various
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b96423c294382ba8f45fa71e727c15b2
https://doi.org/10.2514/1.11462
https://doi.org/10.2514/1.11462
Publikováno v:
Journal of Propulsion and Power. 19:674-682
It is a common practice for cryogenic turbomachines to utilize stiffly mounted bearings due to the incapability of providing significant damping with conventional methods and designs. With no damping available, the historical motive behind this desig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b83cf414cee3d6c29056155add88ead
https://doi.org/10.2514/2.6157
https://doi.org/10.2514/2.6157
Autor:
John M. Vance, Mark Zarzour
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 122:326-329
Metal mesh is a commercially available material used in many applications including seals, heat shields, filters, gaskets, aircraft engine mounts, and vibration absorbers. This material has been tested by the authors as a bearing damper in a rotordyn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d37ed9453af6b20be38e04924b82a1c8
https://doi.org/10.1115/1.483214
https://doi.org/10.1115/1.483214
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 122:330-336
Pocket damper seals perform a dual function: both sealing the pressurized gas around a rotating shaft and providing large amounts of vibration damping. The annular cavity between the labyrinth seal teeth is subdivided into separate annular cavities a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::228eb5fc6d868425d1147ce977e3b6a9
https://doi.org/10.1115/1.483211
https://doi.org/10.1115/1.483211
Autor:
John M. Vance, Daniel Ying
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 122:337-344
Selection criteria and design evaluations of several types of bearing dampers with active control for application to aircraft engines were described in a companion paper (Vance, Ying, and Nikolajsen, 1999). A disk type electrorheological (ER) damper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8c7334b1fef240090a1b42bc43ccc11
https://doi.org/10.1115/1.483212
https://doi.org/10.1115/1.483212
Publikováno v:
Journal of Tribology. 122:317-322
Experimental rotordynamic force coefficients and leakage for a four-blade, two-four pocket gas damper seal are presented and compared to predictions based on a one control volume bulk-flow model. The test rig comprises a vertical shaft and a test sea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b9d01d391044b6cc64e563f7f7bb7fb
https://doi.org/10.1115/1.555360
https://doi.org/10.1115/1.555360
Publikováno v:
Scopus-Elsevier
A bulk-flow model for calculation of the dynamic force characteristics in a single cavity, multiple-pocket gas damper seal is presented. Flow turbulence is accounted for by using turbulent shear stress parameters and Moody’s friction factors in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e38950c917803dc2217ead14ded6315d
https://doi.org/10.1115/1.2817128
https://doi.org/10.1115/1.2817128