NASA NTRS · 19900019299
Blade tip rubbing stress prediction
Abstract
A linear analysis was performed to determine the dynamic response of a turbine blade to intermittent rubbing against a tip seal. The response analysis consisted of a parametric study where the rubbing friction force was assumed to vary as a half sine wave over a preselected contact arc. The length of the contact arc, as well as the pump speed, was varied to determine the effects of each. Results show that for a given contact arc there are distinct critical speeds at which the blade response becomes a maximum.
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Brusher, Gerald A., Davis, Gary A., Shea, Daniel M.. 1988-09-01. Blade tip rubbing stress prediction. https://ntrs.nasa.gov/citations/19900019299
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