To retain the inner ambient temperature of the cryogenic wind tunnel

improve test efficiency and build large-scale cryogenic wind tunnel scientifically

this paper discusses the applicability of regular cryogenic insulation methods to cryogenic wind tunnel

summarizes the research status of the small-scale research-oriented cryogenic wind tunnel and analyses the differences among the external insulation

cold box

internal insulation and integration of internal and external insulation. Based on the literature analysis

it can be found that only the internal insulation is appropriate for large-scale production-based cryogenic wind tunnels. On this basis

three key technologies about the internal insulation system of large-scale cryogenic wind tunnel are elaborated

including designing

cryogenic fluid-structure-thermal analyzing and testing. Finally

future work on the design and construction of the internal insulation system of large-scale cryogenic wind tunnel are prospected.