A GAS-OPERATED BEARING DAMPER FOR TURBOMACHINERY - THEORETICAL PREDICTIONS VERSUS EXPERIMENTAL MEASUREMENTS .2. EXPERIMENTAL RESULTS AND COMPARISON WITH THEORY
P. Sundararajan et Jm. Vance, A GAS-OPERATED BEARING DAMPER FOR TURBOMACHINERY - THEORETICAL PREDICTIONS VERSUS EXPERIMENTAL MEASUREMENTS .2. EXPERIMENTAL RESULTS AND COMPARISON WITH THEORY, Journal of engineering for gas turbines and power, 117(4), 1995, pp. 750-756
This is the second of two papers describing results of a research proj
ect directed at developing a gas-operated vibration damper for high-te
mperature turbomachinery applications. This part presents the experime
ntal measurements made on a gas damper hardware and compares them with
the theoretical predictions given in Part I. It is found that the ise
ntropic theoretical model predicts the damper characteristics quite we
ll. 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 s
uggest that significantly higher damping levels are possible with desi
gn modifications.