Large-scale cryogenic-vacuum facility for gas-dynamic studies

Gas-dynamic facility for study of rarefied gas flow at flowrates of 100 g/s maximum is described. To achieve such pumping rate the facility is equipped with cryogenic pump with 60 m2 surface area. Vacuum plant with mechanical pumps is designated for auxiliary purposes and provides the capacity of 40 m3/c at 1.3 x 10-1 - 6 x 102 Pa pressure. The equipment of diagnostic complex of the facility enables to measure pressure, density, flow rate, to determine flow structure, to visualize the flow. 3 refs., 1 fig