CFD And Experimental Study On Structure Optimization Of Hooks In Corrugated Plates Gas-liquid Separators

Corrugated plate gas-liquid separator is a key part of the steam-water separation device in the nuclear power industry.It removes moisture from steam and improve steam quality and play an important role in ensuring the safe and reliable operation of nuclear power facilities.According to literature reports,corrugated plate gas-liquid separator with hydrophobic hooks can achieve excellent separation performance.However,the influence of hydrophobic hooks structural parameters on separation performance is still not clear enough.When determining the structure size of the hydrophobic hooks,engineers also rely on the previous experience accumulation,so it's necessary to carry out further research.In this paper,taking the double-hook corrugated plate gas-liquid separator as the research objects,both numerical simulations and experimental methods are applied to study the gas flow field and the separation performance of the separator.In the numerical simulation,Fluent 18.0 is utilized to analyze the gas flow field inside the corrugated plates with different hydrophobic hook lengths L and different heights H,and to study the characteristics of separation performance to find the structure size with the best performance.In addition,a numerical simulation on 3D corrugated plate based on those sizes is carried out to study the formation process of internal liquid film.In the experiment,the separation performance of corrugated plates was investigated in different operating conditions.The total efficiency,particle size efficiency and the efficiency considering evaporation are respectively obtained by balance,Promo 3000 aerosol spectrometer and salt content titrator,and the critical speed of corrugated plate is measured.The results show that increasing the length L doesn't improve the separation efficiency,but it brings about a significant increase of the static pressure drop;increasing the height H is an effective way to improve the separation performance for the reason of greater efficiency with lower pressure drop in the condition of small droplets.Considering comprehensively,for the double-hook corrugated plates,the structure with L=9 mm and H=5 mm has the best separation performance.The liquid film in the corrugated plate is mainly distributed on the top and the inner wall surface of the hook.The liquid film on the inner wall surface is developed from the top liquid film.Finally,three kinds of improved corrugated plate separators are proposed.The data from numerical simulations indicates that corrugated plate without hooks in the third level has the best separation performance.