Two-phase cryogenic flow are widely present in high performance cooling systems and in aerospace technology. In this paper we re-examine previously developed cavitation models, used for water liquid, including thermal effect for simulations of cryogenic fluids. Thermal effects substantially impact the cavitation dynamics of cryogenic fluids. Different numerical cavitation models, based on different physics of mass exchange between liquid and vapor phases, were used to simulate the flowfield in external flow. The energy equation for the mixture is solved in conjunction with the mass and momentum conservation, and the evaporative cooling effects of cavitation are accounted for. Performances of the reported cavitation models are tested, comparing the predicted pressure and temperature profiles with the experimental data, with non-cryogenic and cryogenic fluids.
Investigation Of Thermodynamic Effects In Cryogenic Cavitation
DE GIORGI, Maria Grazia
2006-01-01
Abstract
Two-phase cryogenic flow are widely present in high performance cooling systems and in aerospace technology. In this paper we re-examine previously developed cavitation models, used for water liquid, including thermal effect for simulations of cryogenic fluids. Thermal effects substantially impact the cavitation dynamics of cryogenic fluids. Different numerical cavitation models, based on different physics of mass exchange between liquid and vapor phases, were used to simulate the flowfield in external flow. The energy equation for the mixture is solved in conjunction with the mass and momentum conservation, and the evaporative cooling effects of cavitation are accounted for. Performances of the reported cavitation models are tested, comparing the predicted pressure and temperature profiles with the experimental data, with non-cryogenic and cryogenic fluids.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
