Experimental Rotordynamic Coefficient Results for Teeth-on-Rotor and Teeth-on-Stator Labyrinth Gas Seals

[+] Author and Article Information
D. W. Childs, J. K. Scharrer

Mechanical Engineering Department, Turbomachinery Laboratories, Texas A&M University, College Station, TX 77843

J. Eng. Gas Turbines Power 108(4), 599-604 (Oct 01, 1986) (6 pages) doi:10.1115/1.3239953 History: Received December 26, 1985; Online October 15, 2009


An experimental test facility is used to measure the rotordynamic coefficients of teeth-on-rotor and teeth-on-stator labyrinth gas seals. Direct damping coefficients are presented for these seals for the first time. The results are presented for the two seal configurations at identical operating conditions, and show that, in a rotordynamic sense, the teeth-on-stator seal is more stable than the teeth-on-rotor seal, for inlet tangential velocity in the direction of rotation.

Copyright © 1986 by ASME
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