ROTORDYNAMIC COEFFICIENT TEST-RESULTS FOR A 4-STAGE BRUSH SEAL Academic Article uri icon

abstract

  • Experimental results are presented for the direct and cross-coupled stiffness and direct damping coefficients for a four-stage brush seal. Variable test parameters include the inlet pressure, pressure ratio, shaft speed, fluid prerotation, and seal spacing. Direct damping slightly increases with running speed; otherwise, the rotordynamic coefficients are relatively insensitive to changes in the test parameters. Cross-coupled stiffness is generally unchanged by increasing the inlet tangential velocity to the seals, in contrast to conventional labyrinth seals. Comparisons of test results for the four-stage brush seal with an eight-cavity labyrinth showed superior rotordynamic performance for the brush seal, namely, larger values for direct stiffness and lower values for the (destabilizing) cross-coupled stiffness coefficient. 1993, American Institute of Aeronautics and Astronautics, Inc., All rights reserved.

published proceedings

  • JOURNAL OF PROPULSION AND POWER

author list (cited authors)

  • CONNER, K. J., & CHILDS, D. W.

citation count

  • 16

complete list of authors

  • CONNER, KJ||CHILDS, DW

publication date

  • May 1993