Development of Simplified Wave-type Vane in BWR Steam Dryer and Assessment of Vane Droplet Removal Characteristics

Nakao, Toshitsugu; Nagase, Makoto; Aoyama, Goro; Murase, Michio

doi:10.1080/18811248.1999.9726225

Cited by 34 publications

(4 citation statements)

References 4 publications

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“…Air driven by the blower ran though the test section after passing though the entrance pipeline, and flowed out the outlet pipeline. It has been confirmed that the most of the droplets were separated in the first or second stage, when the wet steam passed through a corrugated-plate mist eliminator [8]. So the uniform and stable liquid film was generated in the first stage by slotting at the top of the plate.…”

Section: Validation Of Liquid Film Separation Criterionmentioning

confidence: 86%

Icone23-1235 Research on the Flow Behavior of Liquid Film in the Corrugated-Plate Separator

Liu

Chen

Cheng-xin

et al. 2015

ICONE

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In nuclear power plant, the phenomenon of liquid film breakdown in corrugated-plate separator is common and affects its separation efficiency. The flow behavior of liquid film that fell down along the vertical plate and was driven by airflow was so complicated in the separator that the full attention was paid in this paper. The dynamics and the breakdown of liquid film were determined by such factors as gas velocity, thickness and falling velocity of liquid film and the property of fluids. Based on the conservation of energy, the criterion for predicting liquid film separation was established. Comparisons of the experimental data and the results of the theoretical model showed that the prediction of breakdown of liquid film at the corner was accurate.

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Section: Validation Of Liquid Film Separation Criterionmentioning

confidence: 86%

Icone23-1235 Research on the Flow Behavior of Liquid Film in the Corrugated-Plate Separator

Liu

Chen

Cheng-xin

et al. 2015

ICONE

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“…For the convenience of calculation, the air velocity on the surface of the liquid film

u_{s}

is often used instead of

(||, u_{g} - V_{l})

and the definition equation can be simplified as

W e_{f} = \frac{ρ_{l} u_{s}^{2} h}{σ}

. The liquid film stripping will take place when

W e_{f}

just exceeds the critical value 27 . At this time, the airflow velocity on the surface of the liquid film is called the critical stripping velocity, and the larger the value is, the better the working stability of the inertial stage filter is.…”

Section: Calculation Model and Methodologymentioning

confidence: 99%

“…The liquid film stripping will take place when We f just exceeds the critical value. 27 At this time, the airflow velocity on the surface of the liquid film is called the critical stripping velocity, and the larger the value is, the better the working stability of the inertial stage filter is.…”

Section: Film Strippingmentioning

confidence: 99%

Study on characteristics and mechanism of re‐entrainment in intake filtration components of the gas turbine

Fei,

Wang,

Liu

et al. 2024

Asia-Pacific J Chem Eng

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Aiming at the problem that the droplet re‐entrainment in the intake filtration components affects the gas intake quality and the safe operation of gas turbines, the characteristics and mechanism of the re‐entrainment in a marine double‐hook inertial stage filter are studied, and the distribution of liquid film and re‐entrainment under different inlet air velocities and droplet size distributions are compared. The results show that, due to the influence of inertia and turbulent dispersion, droplets tend to deposit on draining hooks and the lower surface of the leeward side of the blade to form a liquid film. Film stripping is the main form of re‐entrainment under ship‐driving conditions. Due to the high airflow velocity and the large film thickness, hook peaks are the most prone to film stripping, and the critical airflow for film stripping velocity is 14.8 m/s. With the increase of the inlet air velocity, the film thickness at the draining hooks increased first and then decreased, and the film stripping positions were extended from the hook peaks to the rear. Different droplet size distributions mainly affect the liquid film thickness at the draining hook and leeward side of the blade, which in turn affects the film stripping mass.

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“…Chen et al , studied the effect of the drainage hook form in detail, and the results showed that the separation effect was better when the plate hook spacing was gradually decreased from the inlet to the outlet, and decreasing the plate spacing led to the deterioration of the separation effect at the same drain hook spacing. Nakao et al , developed a simplified blade based on the force analysis of droplets in the flow field and also on the experimental finding that droplets were separated mainly in the first and second stages of the corrugated plate. The experimental study can accurately respond to the effect of parameters on performance, but the long period, the small number of test points, and the limitations of the test conditions do not allow visual analysis of the flow field distribution and droplet trajectory within the corrugated plate.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Corrugated Plate Gas–Liquid Separator with the Assistance of the Drainage Hook

Zhao

Cong

et al. 2022

ACS Omega

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Corrugated plate separators are widely used in the field of gas−liquid separation because of their excellent separation performance. The separation effect is very sensitive to the internal auxiliary structure of drainage hooks, so it is extremely important to study the action principle of drainage hooks to optimize the performance of corrugated plate separators. In this paper, Fluent is used as the solver and the realizable k−ε model is used to compare the separation performance of unhooked, single-hooked, and double-hooked corrugated plates. The results show that the separation efficiency of wave plates with hooks can reach 100%, the separation efficiency of wave plates without hooks is about 90%, and the superiority of the separation efficiency of single-hook and double-hook wave plates is related to the droplet partition diameter, which is positively correlated with Re. The pressure drop and separation efficiency increase with the increase of plate hook spacing, and the pressure drop and separation efficiency of single-hook and double-hook corrugated plates have different performance advantage zones influenced by Re and K a . When the Re is 9.64 × 10 3 and K a is 0.294, the separation effect of corrugated plates with the single hook and double hook is the same. Through the analysis of the gas-phase flow field and droplet motion trajectory, it is found that the drainage hook enhances the separation effect of the corrugated plate separator by increasing the local gas velocity and forming a vortex inside the drainage hook.

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Development of Simplified Wave-type Vane in BWR Steam Dryer and Assessment of Vane Droplet Removal Characteristics

Cited by 34 publications

References 4 publications

Icone23-1235 Research on the Flow Behavior of Liquid Film in the Corrugated-Plate Separator

Icone23-1235 Research on the Flow Behavior of Liquid Film in the Corrugated-Plate Separator

Study on characteristics and mechanism of re‐entrainment in intake filtration components of the gas turbine

Simulation Study on the Corrugated Plate Gas–Liquid Separator with the Assistance of the Drainage Hook

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