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Liquid phase evaporation on the normal shock wave in moist air transonic flows in nozzles
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TLDR
In this article, a numerical analysis of the atmospheric air transonic flow through de Laval nozzles is presented, using an in-house CFD code to simulate the formation of liquid phase due to spontaneous condensation of water vapor contained in moist air.Abstract:
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.read more
Citations
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Numerical study of the dehumidification structure optimization based on the modified model
TL;DR: In this paper, a modified model is developed to predict the non-equilibrium condensation flow in a steam turbine, which shows a greater agreement with the experimental data compared with the original model, especially the Wilson point and pressure rise caused by the condensation, and two novel dehumidification structures are presented on the basis of my previous study.
Journal ArticleDOI
The relationship between the nucleation process and boundary conditions on non-equilibrium condensing flow based on the modified model
TL;DR: In this paper, a modified model is developed to predict the non-equilibrium condensation flow in a nozzle and stator cascade, which shows a greater agreement with the experimental data compared with original model.
Journal ArticleDOI
Numerical investigation of novel dehumidification strategies in nuclear plant steam turbine based on the modified nucleation model
Guojie Zhang,Xinzhe Zhang,Fangfang Wang,Dingbiao Wang,Zunlong Jin,Zhongning Zhou,Zhongning Zhou +6 more
TL;DR: In this paper, several novel dehumidification strategies are presented to decrease the wetness loss and increase the safety in nuclear plant steam turbine, and the dehumidity effect is tested by employing the modified model.
Journal ArticleDOI
Effect evaluation of a novel dehumidification structure based on the modified model
TL;DR: In this paper, a dehumidification structure was proposed and the effect was calculated and discussed, and the results showed that the structure had a positive effect on reducing the nucleation zone and the liquid mass fraction.
Journal ArticleDOI
Design and optimization of novel dehumidification strategies based on modified nucleation model in three-dimensional cascade
Guojie Zhang,Xinzhe Zhang,Fangfang Wang,Dingbiao Wang,Zunlong Jin,Zhongning Zhou,Zhongning Zhou +6 more
TL;DR: In this paper, several novel dehumidification strategies are presented to decrease the wetness loss and increase the efficiency in nuclear plant steam turbine, and the dehumidity effect is tested.
References
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Book
Microphysics of Clouds and Precipitation
TL;DR: In this article, the authors focus on one major aspect of cloud microphysics, which involves the processes that lead to the formation of individual cloud and precipitation particles, and provide an account of the major characteristics of atmospheric aerosol particles.
Journal ArticleDOI
Nucleation in Very Rapid Vapor Expansions
TL;DR: In this article, an approximate lower bound for the time (nucleation time) required for the formation of this system of embryos can be calculated by neglecting the thermodynamic barrier which impedes their formation.
Journal ArticleDOI
Transonic flow around airfoils with relaxation and energy supply by homogeneous condensation
TL;DR: In this article, the effects of energy supply in local supersonic flow over airfoils are investigated including a detailed analysis of the two-dimensional structure in the diabatic case.