Conveners
C2PoC - Aerospace Cryocoolers I
- Bradley Moore (JPL)
- Tanh Nguyen (Northrop Grumman)
Modern infrared imagers often rely on split Stirling linear cryocoolers comprising compressor and expander units interconnected by the configurable transfer line. The relative position of the cryocooler components is governed by the optical design along with packaging constraints.
Vibration export produced by such a cryocooler is a pair of tonal and coherent forces. The resulting angular and...
Sorption compressor is the most critical component in a sorption-based cooler that is appealing to many applications because of its plausible feature of vibration-free. To design a sorption compressor, it is essential to understand the thermal and hydraulic behaviors within the sorption cells. In this paper, based on a dynamic model developed previously, the detailed heat and mass transfer in...
Contamination gas is one of the four key factors degrading the long life of pulse tube cryocooler. In this paper, in order to optimize the contamination control measure and improve the life of cryocooler, the transmission of contamination gas had been deeply studied. The fluent software was used to simulate the diffusion of contamination gas among piston clearance, intermediate connecting pipe...
JT compressor is one of the Key components in space 4K JT cryocooler. The oil-free linear compressor becomes issue of the space JT compressor research because of its high reliability, high efficiency, long life and simple structure.
In this paper, the linear JT compressor developed by our laboratory is experimentally studied for the purpose of improving its pressure ratio. The stiffness of...
A high efficiency and low vibration stirling cooler has been demonstrated for cooling down the sensitive IR devices. A high efficiency compressor implementing the technology of dual opposed moving magnet and flexure bearing has been optimized to drive pneumatically a stirling cold finger also implementing flexure bearing technology. Through theoretical study and experimental study on the...
One of the most important characteristics of spaceborne stirling cryocooler is its reliability over a lifetime. The wear abrasion and gas contamination existing in stirling cryocooler are the most failure modes that influence the reliability of spaceborne stirling cryocooler. While design improvements have reduced the probability of the wear abrasion, the excessive gas contamination is still a...
