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The role of thermal and lubricant boundary layers in the transient thermal analysis of spur gearsAn improved convection heat-transfer model has been developed for the prediction of the transient tooth surface temperature of spur gears. The dissipative quality of the lubricating fluid is shown to be limited to the capacity extent of the thermal boundary layer. This phenomenon can be of significance in the determination of the thermal limit of gears accelerating to the point where gear scoring occurs. Steady-state temperature prediction is improved considerably through the use of a variable integration time step that substantially reduces computer time. Computer-generated plots of temperature contours enable the user to animate the propagation of the thermal wave as the gears come into and out of contact, thus contributing to better understanding of this complex problem. This model has a much better capability at predicting gear-tooth temperatures than previous models.
Document ID
19890005081
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
El-Bayoumy, L. E. (California State Coll. Long Beach., United States)
Akin, L. S. (California State Coll. Long Beach., United States)
Townsend, D. P. (NASA Lewis Research Center Cleveland, OH., United States)
Choy, F. C. (Akron Univ. OH., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-TM-101435
E-4413
NAS 1.15:101435
AD-A205574
AVSCOM-TR-88-C-032
Meeting Information
Meeting: International Power Transmission and Gearing Conference
Location: Chicago, IL
Country: United States
Start Date: April 25, 1989
End Date: April 27, 1989
Sponsors: ASME
Accession Number
89N14452
Funding Number(s)
PROJECT: DA PROJ. 1L1-62209-A-47-A
PROJECT: RTOP 505-63-51
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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