Rotary Cryogenic Thermal Coupling.
Final rept. Nov 95-Oct 96,
ELECTRO THERMO ASSOCIATES MANHATTAN BEACH CA
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This Phase 1 Effort developed and demonstrated the principles and practices required for the design and fabrication of Rotary Cryogenic Thermal Couplers. A detailed mathematical thermal analysis of the radiant heat transfer occurring within the basic Rotary Cryogenic Thermal Coupling module was prepared. Module disk fin effectiveness versus the disk radius ratio and component dimensionless characterization parameter, I, was mapped for a specific temperature regime. The thermal analysis demonstrated that the thermal heat leak parasitic losses can be kept within a reasonable percentage of the transferred heat with the use of active thermal shielding. Preliminary design analysis concluded that the unproven, critical component portion of the Rotary Cryogenic Thermal Coupling was the basic radiation coupled disk assembly. Several alternate materials and processes approaches were considered The conclusion was that a concept based on vacuum brazed aluminum fabrication was the best option. A proof of concept module was designed and fabricated, which demonstrated that the module components can be fabricated.
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