The present work tries to tackle the CFD simulation of condensation inside a De Laval nozzle. The intended application is the numerical modelling of supersonic ejectors working with different fluids: R718 (water) and R134a (Freon). Both these refrigerants are “wet” fluid and their expansion inside supersonic nozzles can lead to non-equilibrium condensation that alter the pressure and Mach profiles and induce thermodynamic losses. The numerical analysis of these phenomena requires modelling the microscopic behaviour of the fluid whose properties must be reproduced with a high level of fidelity. In part I of this work, the accuracy of the wet steam model build in a commercial CFD software is evaluated by comparison with an experimental test case. In part II of the work, the same model is adapted to reproduce the properties of Freon.
CFD Modeling of High-Speed Condensation in Supersonic Nozzles, Part I: Steam / giacomelli francesco, mazzelli federico, milazzo adriano. - ELETTRONICO. - (2016), pp. 344-347. (Intervento presentato al convegno 4th International Conference on Computational Methods for Thermal Problems tenutosi a Georgia Institute of Technology, Atlanta, GA, USA nel July 6-8, 2016).
CFD Modeling of High-Speed Condensation in Supersonic Nozzles, Part I: Steam
giacomelli francesco;mazzelli federico
;milazzo adriano
2016
Abstract
The present work tries to tackle the CFD simulation of condensation inside a De Laval nozzle. The intended application is the numerical modelling of supersonic ejectors working with different fluids: R718 (water) and R134a (Freon). Both these refrigerants are “wet” fluid and their expansion inside supersonic nozzles can lead to non-equilibrium condensation that alter the pressure and Mach profiles and induce thermodynamic losses. The numerical analysis of these phenomena requires modelling the microscopic behaviour of the fluid whose properties must be reproduced with a high level of fidelity. In part I of this work, the accuracy of the wet steam model build in a commercial CFD software is evaluated by comparison with an experimental test case. In part II of the work, the same model is adapted to reproduce the properties of Freon.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.