Abstract
An existing rotordynamic test apparatus is modified for a new type of gas damper seal. Experimental results including coastdowns, rap tests and leakage from the gas damper seal are presented along with comparison tests of a conventional labyrinth seal of the same geometrical dimensions and inlet clearance. Coastdown tests through the critical speed show large reductions in peak response to imbalance in all cases, with the critical speed being completely eliminated by the tested gas damper seal. Rap tests illustrate that the damping advantage of the gas damper seal increases with inlet air pressure and becomes overwhelming at inlet pressure above 40 psia. Experimental results show that the leakage rate of the tested gas damper seal is typically 30% higher than that of the conventional labyrinth seal. A comparison of test results to analytical predictions is also presented in this thesis.
Li, Qiming (1995). The effect of a new damper seal on rotordynamics. Master's thesis, Texas A&M University. Available electronically from
https : / /hdl .handle .net /1969 .1 /ETD -TAMU -1995 -THESIS -L553.