NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Re-Entry Aeroheating Analysis of Tile-Repair Augers for the Shuttle OrbiterComputational re-entry aerothermodynamic analysis of the Space Shuttle Orbiter s tile overlay repair (TOR) sub-assembly is presented. Entry aeroheating analyses are conducted to characterize the aerothermodynamic environment of the TOR and to provide necessary inputs for future TOR thermal and structural analyses. The TOR sub-assembly consists of a thin plate and several augers and spacers that serve as the TOR fasteners. For the computational analysis, the Langley Aerothermodynamic Upwind Relaxation Algorithm (LAURA) is used. A 5-species non-equilibrium chemistry model with a finite rate catalytic recombination model and a radiation equilibrium wall condition are used. It is assumed that wall properties are the same as reaction cured glass (RCG) properties with a surface emissivity of epsilon = 0.89. Surface heat transfer rates for the TOR and tile repair augers (TRA) are computed at a STS-107 trajectory point corresponding to Mach 18 free stream conditions. Computational results show that the average heating bump factor (BF), which is a ratio of local heat transfer rate to a design reference point located at the damage site, for the auger head alone is about 1.9. It is also shown that the average BF for the combined auger and washer heads is about 2.0.
Document ID
20070029233
Document Type
Conference Paper
Authors
Mazaheri, Ali R. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Wood, William A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 23, 2013
Publication Date
June 25, 2007
Subject Category
Spacecraft Design, Testing and Performance
Report/Patent Number
AIAA Paper 2007-4148
Meeting Information
37th AIAA Fluid Dynamics Conference and Exhibit(Miami, FL)
Funding Number(s)
CONTRACT_GRANT: NNL06AC49T
WBS: WBS 732759.07.05
Distribution Limits
Public
Copyright
Public Use Permitted.

Available Downloads

NameType 20070029233.pdf STI