Statistics – Computation
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aero.reptq....c&link_type=abstract
Technical Report, Jan. 1991 - Jan. 1992 Aerospace Corp., El Segundo, CA.
Statistics
Computation
Computational Grids, Conductive Heat Transfer, Finite Element Method, Grid Generation (Mathematics), Temperature Distribution, Thermal Analysis, High Resolution, Solid Propellant Rocket Engines, Temperature Effects, Temperature Gradients, Titan 4 Launch Vehicle
Scientific paper
An efficient method has been developed for obtaining a high-resolution temperature distribution of the transient heat conduction inside an arbitrary domain containing any number of anisotropic materials. The method combines an adaptive, unstructured, mesh generation technique and a finite-element analysis program for a multi-material thermal analysis. The technique allows easy generation of fine elements in a high-temperature gradient area and coarse elements in a low-temperature gradient area to enhance the quality of analysis results with minimum effort and cost. Continuity of finite-element mesh across the boundaries of multiple materials is precisely preserved. The thermal conduction inside an infinite cylinder and inside a two-layer slab is analyzed, and the results are compared to the exact solution to validate the solution procedure. Application of the method to investigate heat penetration in the Titan 4 Solid Rocket Motor Upgrade nozzle flexseal of a multi-material structure is demonstrated. Extension of the method to calculate thermal response of a Star-37S nozzle/exit cone insulation and supporting structure with complicated, multiple charring materials is discussed.
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