Analysis of the moist air transonic flow in the symmetric and asymmetric nozzle of the low expansion

Abstract Condensation has a negative impact on turbomachinery efficiency in many energy processes. This paper compares the expansion of moist air symmetric and asymmetric nozzles with low rate. The presented numerical study is supported by analytical experimental research. tWesting was carried out using an in-house test rig where two were examined for relative humidity about 25%. tested supersonic outlet, as well outlet condition elevated pressure, which resulted occurrence normal shock section. nozzle profile congruent nozzle. However, walls are shifted linearly flow direction. Schlieren photography technique static pressure measurements wall used qualitative identification both condensation waves. modelling conducted commercial computational fluid dynamics software extended model. code validated against experiment data available literature. analysis considered types very rate revealed interesting structures linear shift process interaction wave aerodynamic oblique waves investigated.