OPTIMIZATION OF LAYER DENSITIES FOR MULTILAYERED INSULATION SYSTEMS
- NASA Kennedy Space Center, KT-E Kennedy Space Center, FL 32899 (United States)
Numerous tests of various multilayer insulation systems have indicated that there are optimal densities for these systems. However, the only method of calculating this optimal density was by a complex physics based algorithm developed by McIntosh. In the 1970's much data were collected on the performance of these insulation systems with many different variables analyzed. All formulas generated included number of layers and layer density as geometric variables in solving for the heat flux, none of them was in a differentiable form for a single geometric variable. It was recently discovered that by converting the equations from heat flux to thermal conductivity using Fourier's Law, the equations became functions of layer density, temperatures, and material properties only. The thickness and number of layers of the blanket were merged into a layer density. These equations were then differentiated with respect to layer density. By setting the first derivative equal to zero, and solving for the layer density, the critical layer density was determined. This method was checked and validated using test data from the Multipurpose Hydrogen Testbed which was designed using Mcintosh's algorithm.
- OSTI ID:
- 21371807
- Journal Information:
- AIP Conference Proceedings, Vol. 1218, Issue 1; Conference: International cryogenic materials conference (ICMC) on advances in cryogenic engineering materials, Tucson, AZ (United States), 28 Jun - 2 Jul 2009; Other Information: DOI: 10.1063/1.3422434; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ALGORITHMS
DENSITY
HEAT FLUX
HEAT RESISTANT MATERIALS
HEAT TRANSFER
HYDROGEN
LAYERS
OPTIMIZATION
PERFORMANCE
SHIELDING
SHIELDING MATERIALS
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
THERMAL INSULATION
THICKNESS
DIMENSIONS
ELEMENTS
ENERGY TRANSFER
MATERIALS
MATHEMATICAL LOGIC
NONMETALS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES