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SSME LOX post flow analysis/fluid structure interaction. Volume 1: Flow analysisThe realization of measures to improve the performance of the Space Shuttle is, to a large extent, dependent on an improved understanding of the fluid flow phenomena occurring in the main engine. The overall arrangement of the primary components of the Space Shuttle Main Engine (SSME) are presented. The impingement of the hot gases from the transfer ducts onto the LOX posts causes them to be subjected to severe thermal and gas dynamic loads, which in the past have resulted in the occasional breakage of some elements of the outer row of posts during test firings of the engine, particularly at higher power levels. Large velocities in the gap between the LOX posts may also be a contributing factor in causing dynamic stability problems. The deforming structural response of the posts to the pressure loading may likely affect the gas flowfield by producing a moving flowfield boundary, thereby creating a dynamically coupled unsteady fluid-structure system. The objective was to investigate the three-dimensional, turbulent flow around a simplified SSME LOX post array using an existing Reynolds averaged Navier-Stokes flow solver and a suitable turbulence model to parameterize the turbulent shear stresses. Numerical computations were performed to analyze the effect on the flowfield of varying the spacing between the LOX posts, which were modeled as rigid, three-dimensional circular cylinders. The methodology used in the computations is described. Results are presented.
Document ID
19900004399
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Burke, Roger W. (Lockheed Missiles and Space Co. Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1989
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-183677
LMSC-HEC-TR-F268618-VOL-1
NAS 1.26:183677
Accession Number
90N13715
Funding Number(s)
CONTRACT_GRANT: NAS8-37361
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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