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1Liquid Phase Evaporation on the Normal Shock Wave in Moist Air Transonic Flows in Nozzles显示文摘This paper presents a numerical analysis of the atmospheric air transonic flow through de Laval nozzles. By nature, atmospheric air always contains a certain amount of water vapor. The calculations were made using a Laval nozzle with a high expansion rate and a convergent-divergent(CD) 'half-nozzle', referred to as a transonic diffuser, with a much slower expansion rate. The calculations were performed using an in-house CFD code. The computational model made it possible to simulate the formation of the liquid phase due to spontaneous condensation of water vapor contained in moist air. The transonic flow calculations also take account of the presence of a normal shock wave in the nozzle supersonic part to analyze the effect of the liquid phase evaporation.Slawomir Dykas Artur Szymański Miroslaw Majkut 2017Journal of Thermal Science2017,26,3:1
2Influence of Air Humidity on Transonic Flows with Weak Shock Waves显示文摘The paper presents CFD results for the transonic flow of dry and moist air through a diffuser and a compressor rotor.In both test geometries,i.e.the Sajben transonic diffuser and the NASA Rotor 37,the air humidity impact on the structure of flows with weak shock waves was examined.The CFD simulations were performed by means of an in-house CFD code,which was the RANS-based modelling approach to compressible flow solutions.It is shown that at high values of relative humidity,above 70%,the modelling of the transonic flow field with weak shock waves by means of the dry air model may produce wrong results.DYKAS Slawomir MAJKUT Miroslaw SMOLKA Krystian 2020Journal of Thermal Science2020,29,6:0
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