This is the second of two papers describing results of a research project directed at developing a gas-operated vibration damper for high-temperature turbomachinery applications. This part presents the experimental measurements made on a gas damper hardware and compares them with the theoretical predictions given in Part I. It is found that the isentropic theoretical model predicts the damper characteristics quite well. A maximum damping of 2310 N-s/m (13.2 lb-s/in.) was measured at a natural frequency of 118 Hz using the present design and the results suggest that significantly higher damping levels are possible with design modifications.

Issue Section:
Gas Turbines: Structures and Dynamics
Topics:
Bearings, Dampers, Turbomachinery, Damping, Design, Hardware, High temperature, Vibration dampers
1.
Sundararajan, P., and Vance, J. M., 1993, “A Theoretical and Experimental Investigation of a Gas Operated Bearing Damper for Turbomachinery: Part II—Experimental Results and Comparison With Theory,” Vibration of Rotating Systems, ASME DE-Vol. 60, pp. 85–119.
2.
Sundararajan
P.
, and
Vance
J. M.
,
1995
, “
A Gas-Operated Bearing Damper for Turbomachinery: Theoretical Predictions Versus Experimental Measurements: Part I—Theoretical Model and Predictions
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
117
, this issue, pp.
741
–
748
.
3.
Vance
J. M.
,
Cardon
B. P.
,
San Andres
L. A.
, and
Storace
A. F.
,
1993
, “
A Gas-Operated Bearing Damper for Turbomachinery
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
115
, pp.
383
–
389
.
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Copyright © 1995
 by The American Society of Mechanical Engineers
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