A generalized theory for eccentric and misalignment effects in high-pressure annular sealsHigh-pressure annular seal leakage and dynamic coefficients vary with eccentricity and misalignment. Recent seal leakage data with both concentric and fully eccentric alignments support the seal leakage model with surface roughness and eccentricity effects included. In this paper, the seal dynamic coefficient calculation has been generalized and allows direct calculation of the seal dynamic coefficients at any circumferential location. The generalized solution agrees with the results obtained by using the calculated values of an earlier paper and performing a coordinate transformation. The analysis results coincide with the measured data in showing that the stiffness and damping matrices of seal coefficients are not skew symmetric, and the main diagonal seal coefficients are not equal. The measured direct stiffnesses were found higher than predicted by the concentric seal theory, but this may be explained by the presence of eccentricity in the test operating mode.
Document ID
19860060651
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chen, W. C. (Rockwell International Corp. Canoga Park, CA, United States)
Jackson, E. D. (Rockwell International Corp. Rocketdyne Div., Canoga Park, CA, United States)