The high pressure oxidizer turbopump (HOTP) used in the Space Shuttle main engine is a centrifugal pump that delivers liquid oxygen to the main combustion chamber and other parts of the engine. The current pump was designed in the 1970's, and because of advances in technology, a new design has been developed. Designated as the Alternate Turbopump Development (ATD) HPOTP, this pump is interchangeable with the current design. Because of the complexity of the pump, the fit between components and deformations of all critical components cannot be measured under running conditions. All previous analyses of the ATD oxydizer pump were based on two-dimensional axisymmetric models, but the geometry and loading of the turbopump are far from symmetric. A three-dimensional model of all stationary components of the pump was built and analyzed using a superelement solution technique to obtain a better understanding of the pump behavior and to support pump testing. This paper describes the methods used to determine deflections. Since the running condition of the pump is highly sensitive to the interaction between components, an accurate model of the pump and accurate representation of the interfaces between components was necessary to reliably predict deformations.
Finite element analysis of the space shuttle main engine (SSME) alternate turbopump development (ATD) high pressure oxidizer turbopump (HPOTP)
Finite Elemente Untersuchung der Hochdruck-Oxidationsturbopumpe und einer neu entwickelten alternierenden Turbopumpe für das Haupttriebwerk des SPACE SHUTTLES
1993
10 Seiten, 12 Bilder, 6 Quellen
Conference paper
English
Raumfahrttechnik , Raumfähre , Raketentriebwerk , Turbopumpe , Kreiselpumpe , Flüssigsauerstoff , technische Entwicklung , Technikbewertung , Finite-Elemente-Methode , Leistungsbewertung , Vergleich (System) , Betriebsverhalten , Simulationsmodell , Betriebssicherheit , Ausfallwahrscheinlichkeit , Prozessoptimierung