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contributor authorWilkes, Jason
contributor authorCater, Ryan
contributor authorSwanson, Erik
contributor authorPassmore, Kevin
contributor authorBrady, Jerry
date accessioned2022-05-08T09:21:10Z
date available2022-05-08T09:21:10Z
date copyright3/11/2022 12:00:00 AM
date issued2022
identifier issn0742-4795
identifier othergtp_144_06_061003.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4285031
description abstractThis paper will show the influence of ambient pressure on the thrust capacity of bump-foil and spiral-groove gas thrust bearings. The bearings were operating in nitrogen at various pressures up to 69 bar and were tested to failure. Failure was detected at various pressures by incrementally increasing the thrust load applied to the thrust bearing until the bearing was no longer thermally stable, or until contact was observed by a temperature spike measured by thermocouples within the bearing. These tests were performed on a novel thrust bearing test rig that was developed to allow thrust testing at pressures up to 207 bar cavity pressure at 260 °C while rotating at speeds up to 120,000 rpm. The test rig floats on hydrostatic air bearings to allow for the direct measurement of applied thrust load through linkages that connect the stationary thrust loader to the rotor housing. Test results on a 65 mm (2.56 in.) bump-foil thrust bearing at 100 krpm show a marked increase in load capacity with gas density, which has not previously been shown experimentally. Results also show that the load capacity of a similarly sized spiral-groove thrust bearing are relatively insensitive to pressure, and supported an order-of-magnitude less load than that observed for the bump-foil thrust bearing. These results are compared with analytical predictions, which agree reasonably with the experimental results. Predicted power loss is also presented for the bump-foil bearing
description abstracthowever, measured power loss was substantially higher.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig
typeJournal Paper
journal volume144
journal issue6
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4053715
journal fristpage61003-1
journal lastpage61003-8
page8
treeJournal of Engineering for Gas Turbines and Power:;2022:;volume( 144 ):;issue: 006
contenttypeFulltext


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