Outlet nozzle structure optimized four conclusions

Optimized by numerical simulation and experimental study of the outlet nozzle structure. An effective solution to the issues raised in the two-dimensional periodic analog the outlet nozzle high-speed flow and channel reverse shock. The important conclusions are as follows:
(1) using the arc cavity instead of the cylindrical chamber may be reduced within the high-speed flow resistance in the outlet nozzles, is conducive to high temperature exhaust of the channel, thereby improving the isentropic efficiency of refrigeration.
(2) increasing wave-outlet nozzle, you can eliminate the reverse shock within the channel, but at the same time increase the high temperature exhaust resistance of the channel.
(3) wave-effect of optimization of the device performance depends on the import and export of nozzle width match. The optimum matching condition, the isentropic efficiency of refrigeration substantially no impact; under non-optimal matching conditions conducive cooling efficiency of the entropy.
(4) more favorable to the outlet nozzle wave-line left channel expansion wave instantaneous cooling effect refrigerator for pressure exchange for the cryogenic separation of heavies