In Part 1, an analysis was presented for the calculation of rotordynamic coefficients for the SSME HPFTP impeller interstage seals having wavy solid boundaries (i.e. nonlinear clearance functions). This is a significant extension beyond prior analyses which considered only straight and/or tapered seal boundaries. Part 2 presents the detailed rotordynamic analysis of the SSME HPFTP, and quantifies the effect of the seal analysis refinement on the rotordynamics. Results are presented for both the linearized stability model of the turbopump as well as nonlinear steady state response simulations. The nonlinear studies involve a combination of low level parametrically-excited and self-excited subsynchronous rotor motion closely resembling actual hot fire accelerometer and displacement data. Direct comparisons are made for the current interstage seal hardware employing equally smooth rotor and stator surfaces, as well as a set of new knurled seals scheduled for engine testing in 1989.
The SSME HPFTP wavy interstage seal: part 2 - Rotordynamic analysis
Die SSME HPFTP wellige Zwischendichtung: teil 2 - Rotordynamische Analyse
1989
7 Seiten, 7 Bilder, 4 Tabellen, 16 Quellen
Conference paper
English
The SSME HPFTP wavy interstage seal: Part 1 - Seal analysis
Tema Archive | 1989
|Suppression of subsynchronous vibration in the SSME HPFTP
Tema Archive | 1991
|