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Evaluation of Gas Lubricated Hydrodynamic Bearings in a Gas Turbine Environment
Report Number: AFAPL TR 72-41
Author(s): Swenson, Kendall R.; Hughes, Nick M.; Heuer, Don F.
Corporate Author: Airesearch Manufactruing Company of Arizona
Corp. Rep. Number: AT-6219-R
Laboratory: Air Force Aero Propulsion Laboratory
Publication Date: 6/1/1972
Pages: 59
Features: + Diagram(s) + Drawing(s) + Graph(s) + Photo(s)
Contract: F33615-71-C-1376
Project: None Given
Task: None Given
AD Number: AD0744844
Photo Enhancement: Complete
Abstract Text:
The report contains a summary of the design analysis, development testing, and demonstration testing performed to demonstrate the feasibility of using gas lubricated hydrodynamic bearings in a gas turbine environment. The gas generator portion of the jet fuel starter used on the A7D aircraft was modified to incorporate compliant-foil gas bearings and subjected to varied demonstration test. In addition, engine starts were made under conditions which simulated normal starting gear loads. Results of the testing were very satisfactory. It is concluded that gas lubricated bearings can be used in a gas turbine application and further testing is encouraged.
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This report is avalable for download via Contrails:  (59 pages, 1.69 MB)
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This report is not available for download via DTIC Online
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This report is not available for download via NTRS
Via National Technical Information Service:
The NTIS Order Number for this report is: AD744844
This report should be available for purchase from NTIS at 1-800-553-NTIS
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Indications of Public Availabilty:
No digitial image of an index entry indicating public availability is currently available
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Research on Elastohydrodynamic Lubrication of High Speed Rolling-Sliding Contacts
Report Number: AFAPL TR 72-56
Author(s): Smith, Richard L.; Walowit, Jed A.; Gupta, Pradeep K.; McGrew, John M.
Corporate Author: Mechanical Technology Inc Latham N Y
Laboratory: Air Force Aero Propulsion Laboratory
Publication Date: 7/1/1972
Pages: 164
Features: + Graph(s) + Photo(s) + Table(s)
Contract: F33615-69-C-1305
Project: 3048
Task: 304806
AD Number: AD0750752
Photo Enhancement: Complete
Abstract Text:
A rolling disc apparatus was used to obtain traction measurements for a MIL-L-7808 oil. A full matrix of data covering a range of loads, speeds, and temperatures are presented along with analytical correlation which reasonably describes the data over these parameters. Attempts were made to measure film thickness with optical, capacitance, and X-ray measuring techniques. The partial elastohydrodynamic regime was studied analytically and experimentally. Electrical continuity and resistance data have been obtained and comparisons between measured electrical resistance and predictions obtained with the asperity interactions analysis put forth in Task 2 were obtained.
Options for obtaining report:
Via Contrails:
This report is avalable for download via Contrails: (164 pages, 3.365 MB)
Via DTIC Online:
This report is available for download via DTIC Online: (156 pages, 7 MB)
Via NASA Technical Report Server:
This report is not available for download via NTRS
Via National Technical Information Service:
The NTIS Order Number for this report is: AD750752
This report should be available for purchase from NTIS at 1-800-553-NTIS
Reference the NTIS Order Number from this record when ordering from NTIS
Be sure to verify bibilographic info when ordering
Indications of Public Availabilty:
No digitial image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement
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