Study on flow pattern and separation performance of air–water swirl-vane separator

Xiong, Zhenqin; Lu, Mingchao; Wang, Minglu; Gu, Haihua; Xu, Cheng

doi:10.1016/j.anucene.2013.07.026

Cited by 69 publications

(14 citation statements)

References 7 publications

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“…Success in modernization of the MSR was to considerable extend caused by arranging separate outlets for moisture depositing at the walls [21] and bottom of the inlet chamber via a perforated sheet with holes. A reduction in the steam wetness at the inlet to the separation units and improvement of the flow distribution over the MSR perimeter decreased a load at the louvers and provided high efficiency of drying the steam flow [22].…”

Section: Methods Of Modernization Of the Separator Part Of The Msrmentioning

confidence: 99%

Fluid mechanics tests of separator-reheater turbines

Egorov

Suslov²

2018

MATEC Web Conf.

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The main aim of the current work is to increase operation efficiency and reliability of moisture separator-reheaters and turbines of NPPs. As the experience from MSR-500-1 operation showed the presence of large disperse moisture leads stops of the turbine. The high wetness level of steam downstream of separating devices observed since the first years of operation. Results from tests of the modernized separator-reheaters of the first unit at the Smolensk NPP with «Powervane» louvers developed by Balcke-Durr company are presented. Results from studies on the determination of wetness of the steam at the outlet from the separating part of the MSR-14, MSR-24, which demonstrate advantages of modernized construction are discussed. Modernization of separator-reheaters of the turbines TG-1, TG-2 resulted in eliminating non-uniformity of wetness over the perimeter and height of the steam space downstream the separation units. Success in modernization was caused by arranging separate outlets for moisture depositing at the walls, bottom of the inlet chamber. According to the results of the carried out studies an average value of the wetness at the outlet of the separation units was 0.6% which is close to the design value 0.5%.

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Section: Methods Of Modernization Of the Separator Part Of The Msrmentioning

confidence: 99%

Fluid mechanics tests of separator-reheater turbines

Egorov

Suslov²

2018

MATEC Web Conf.

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“…Experimental results show that the axial cyclone can maintain high separation efficiency only in high gas volume fraction, in which the flow of the gas-liquid two-phase mixture is relatively stable (Matsubayashi et al, 2012;Dixit et al, 2015). However, when the gas-liquid mixture before entering the separator is in unstable flow pattern, the separation efficiency drops sharply (Xiong et al, 2013(Xiong et al, , 2014Funahashi et al, 2016).…”

Section: Introductionmentioning

confidence: 95%

“…At present, the centrifugal gas-liquid separators used in the nuclear power plant are mainly divided into two categories: single-stage swirl-vane separator and multi-stages swirl-vane separator. The former is mainly used for the initial separation of water in steam, and the flow pattern of gasliquid mixture to be separated is mainly annular flow or mist flow (Xiong et al, 2013(Xiong et al, , 2014Mao et al, 2018). The latter is mainly designed for the separation of fission gas in Molt Salt Reactor (MSR).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on a New Type of Separator for Gas Liquid Separation

Zheng¹,

Yang²,

Wang

et al. 2019

Front. Energy Res.

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Gas-liquid separation technology is widely used in various fields of industrial production. In this research, a new kind of gas-liquid separator was proposed for the separation of gas-liquid mixture under different flow patterns. An inclined experimental system with an angle of 60 degrees from the vertical was established to test the new designed gas-liquid separator using of water and air as the working fluid. The experiment was conducted with the water flow rates covering 2.85-4.17 m 3 /h and the gas volume fraction covering 5-90%. Experiment results show that the separator can enable high efficient separation of gas-liquid mixtures under different patterns, especially under unstable flow patterns. The liquid level inside the separator is an important factor affecting the performance of the separator. On the basis of this, the critical liquid level of the separator was proposed for the practical application of the separator. This study fills the gap in the field of gas-liquid separation and provides a method for the separation of gas-liquid mixtures under different flow patterns.

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“…Vapor dynamic viscosity (Pa•s) Δp Pressure difference between the droplet surface and environment (Pa) dryer and pointed out that there are four mechanisms of fine droplet carryover. In addition, Xiong et al (2013Xiong et al ( , 2014, Liu and Bai (2016), and Xu et al (2016) have also conducted a lot of numerical and experimental studies on flow pattern and separation performance of swirl-vane separator. However, most of the above investigations are related to the droplet and steam motion, separation efficiency, and pressure drop.…”

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

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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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Study on flow pattern and separation performance of air–water swirl-vane separator

Cited by 69 publications

References 7 publications

Fluid mechanics tests of separator-reheater turbines

Fluid mechanics tests of separator-reheater turbines

Experimental Study on a New Type of Separator for Gas Liquid Separation

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

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