Study on working mechanism of AP1000 moisture separator by numerical modeling

Zhang, Huang; Liu, Qianfeng; Qin, Benke; Bo, Hanliang; Chen, Feng

doi:10.1016/j.anucene.2016.01.013

Cited by 35 publications

(3 citation statements)

References 13 publications

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“…The whole droplet motion model includes the droplet displacement x(t), rotation velocity ω(t) and velocity v(t) equations (Zhang et al, 2016) and the expressions are as follows:…”

Section: Droplet Motion Modelmentioning

confidence: 99%

“…Here, C M , C D , C Ma , C Sa are coefficients of the rotation moment, drag force, Magnus lift force and Saffman lift force, respectively (Zhang et al, 2015(Zhang et al, , 2016Zhao et al, 2018 It should be pointed that the local gas parameters at the position of nr surrounding the droplet rather than that at infinity are adopted in Equation ( 1)~( 16), including the gas velocity, temperature, curl of flow field, etc. The gas parameters are calculated by k-d tree searching approach and the interpolation method (Zhang et al, 2015), by which the instaneous changes of the local gas flow field and the instaneous effects of the fluid field on the droplet can be tracked.…”

Section: Droplet Energy Equationmentioning

confidence: 99%

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Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Meng

Yan²,

Zhao

et al. 2019

JTST

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The fuel oil atomization is closely related to the combustion performance of the fuel in the internal combustion engine. However, during the oil atomization, the fast evaporating and moving oil droplets interact strongly with the surrounding gas, posing challenges towards the precise simulation of the combustion process. To precisely capture the interactions between fuel droplets and the surrounding gas, a new multi-droplets motion and evaporation model is deduced by introducing the local parameters surrounding the fuel droplets. The proposed model is validated comparing the simulation results against the experimental data of the containment spray process. Subsequently, the present model is adopted to simulate the fuel spray process in the typical constant volume bomb. The parameters evolution is presented during the course of the spray such as the gas temperature, droplet temperature, evaporating rate, velocity, radii variation, vapor concentration and air-fuel ratio. The analysis of the spray performance is conducted and the superiority of the new model is also discussed. The simulation analysis reveals that the spray droplets interact strongly with the surrounding gas; the developed droplet motion and evaporation model is advantageous in the simulation of the dense multi-droplets spray process.

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“…The whole droplet motion model includes the droplet displacement x(t), rotation velocity ω(t) and velocity v(t) equations (Zhang et al, 2016) and the expressions are as follows:…”

Section: Droplet Motion Modelmentioning

confidence: 99%

Section: Droplet Energy Equationmentioning

confidence: 99%

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Meng

Yan²,

Zhao

et al. 2019

JTST

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rahman et al (2013) numerically analyzed two phase flow separation using swirling fluidics based on a new type of low cost simplified innovative separator using lattice core configuration. Zhang et al (2015Zhang et al ( , 2016 studied the working mechanism of AP 1000 moisture separator consisting of primary, gravity, and secondary separators by the Lagrange-Euler approach and pointed out that the separation efficiency of primary separator was beyond 90%. Nakao et al (1999) Liquid-vapor interface evaporation-condensation coefficient…”

Section: Introductionmentioning

confidence: 99%

Ratio analysis of two mechanisms of static droplet evaporation driven by pressure difference

Zhao

Liu

Lin

et al. 2019

Exp. Comput. Multiph. Flow

Self Cite

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When droplet moving in the steam-water separator, the gas pressure will decrease due to flow resistance and the liquid-vapor equilibrium at the droplet surface will be broken. The droplet evaporates continuously as a result. The fast evaporation mechanism and thermal balance evaporation mechanism are presented for the droplet evaporation at cases of pressure variation. The droplet phase change model due to pressure variation is formulated. Subsequently, the effects of pressure difference on the droplet evaporation characteristics are analyzed. The ratio analysis of the two mechanisms is conducted. The droplet evaporation map over the ratio of two mechanisms is drawn. The numerical results indicate that the pressure difference significantly influences the droplet evaporation characteristics. Under most conditions, the droplet evaporation characteristics are dominated by the combined action of two mechanisms. For large pressure difference and small droplets, the fast evaporation mechanism dominates the evaporation process, and vice versa. With increasing pressure difference between the droplet and the surrounding environment, the droplet evaporates faster and the percentage of fast evaporation mechanism decreases gradually. The present work can lay the foundation for further investigation on the moving droplet evaporation.

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Droplet phase change model and its application in wave-type vanes of steam generator

Zhao

2018

Annals of Nuclear Energy

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Study on working mechanism of AP1000 moisture separator by numerical modeling

Cited by 35 publications

References 13 publications

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Ratio analysis of two mechanisms of static droplet evaporation driven by pressure difference

Droplet phase change model and its application in wave-type vanes of steam generator

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