Auteur Childs, Dara W.
Documents disponibles écrits par cet auteur (8)
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Article : texte imprimé
Childs, Dara W., Auteur ; Dhruv Kumar, Auteur |The present work investigates dry-friction whip and whirl phenomena for a rigid rotor contacting at two bearing locations. The idea originated with a paper by Clark et al. (2009, “Investigation of the NRG #40 Anemometer Slowdown,” American Wind [...]
Article : texte imprimé
Childs, Dara W., Auteur ; Bassem Kheireddin, Auteur ; Stephen Phillips, Auteur |A flat-plate tester was used to measure the friction factor behavior for a hole-pattern roughened surface apposed to a smooth surface. The tests were executed to characterize the friction factor behavior of annular seals that use a roughened-sur[...]
Article : texte imprimé
Chris D. Kulhanek, Auteur ; Childs, Dara W., Auteur |Static and rotordynamic coefficients are measured for a rocker-pivot, tilting-pad journal bearing (TPJB) with 50 and 60% offset pads in a load-between-pad (LBP) configuration. The bearing uses leading-edge-groove direct lubrication and has the f[...]
Article : texte imprimé
Childs, Dara W., Auteur ; Rohit Saha, Auteur |Morton Effect problems involve the steady increase in rotor synchronous-response amplitudes due to differential heating across a fluid-film bearing that is induced by synchronous response. The present work presents a new computational algorithm [...]
Article : texte imprimé
Manish R. Thorat, Auteur ; Childs, Dara W., Auteur |Prior one-control-volume (1CV) models for rotor-fluid interaction in labyrinth seals produce synchronously reduced (at running speed), frequency-independent stiffness and damping coefficients. The 1CV model, consisting of a leakage equation, a c[...]
Article : texte imprimé
Childs, Dara W., Auteur ; Carter, Clint R., Auteur |Rotordynamic data are presented for a rocker-pivot tilting pad bearing in load-on-pad (LOP) configuration for (345–3101 kPa) unit loads and speeds from 4000 rpm to 13,000 rpm. The bearing was directly lubricated through a leading edge groove wit[...]
Article : texte imprimé
Manoj K. Gupta, Auteur ; Childs, Dara W., Auteur |An analysis is developed for a compressible bulk-flow model of the leakage path between a centrifugal-compressor impeller's shroud and its housing along the impeller's front and back sides. This development is an extension of analyses performed [...]
Article : texte imprimé
Jason C. Wilkes, Auteur ; Childs, Dara W., Auteur ; Benjamin J. Dyck, Auteur |The nature of dry-friction whip and whirl is investigated through experimental and numerical methods. A test rig was designed and constructed to demonstrate and record the character of multimode dry-friction whip and whirl. These tests examined [...]
