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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

A Gas-Operated Bearing Damper for Turbomachinery—Theoretical Predictions Versus Experimental Measurements: Part II—Experimental Results and Comparison With Theory

[+] Author and Article Information
P. Sundararajan, J. M. Vance

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77840

J. Eng. Gas Turbines Power 117(4), 750-756 (Oct 01, 1995) (7 pages) doi:10.1115/1.2815461 History: Received July 15, 1994; Online November 19, 2007

Abstract

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.

Copyright © 1995 by The American Society of Mechanical Engineers
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