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Numerical Investigation on Dynamic Response Characteristics of fluid-Structure Interaction of Gas-Liquid Two-Phase Flow in Horizontal Pipe

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Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 237-244页

作者：王志伟何炎平李铭志仇明黄超刘亚东王梓 State Key Laboratory of Ocean Engineering School of Naval ArchitectureOcean&Civil EngineeringInstitute of Marine EquipmentShanghai Jiao Tong UniversityShanghai 200240China COSCO Shipping(Qidong)Offshore Co.Ltd. Qidong 226200JiangsuChina

fluid-structure interaction(FSI)of gas-liquid two-phase fow in the horizontal pipe is investigated numerically in the present study.The volume of fluid model and standard k-e turbulence model are integrated to simulate the typical gas-liquid two-phase fow patterns.First,validation of the numerical model is conducted and the typical fow patterns are consistent with the Baker chart.Then,the FSI framework is established to investigate the dynamic responses of the interaction between the horizontal pipe and gas-liquid two-phase fow.The results show that the dynamic response under stratified fow condition is relatively flat and the maximum pipe deformation and equivalent stress are 1.8 mm and 7.5 MPa respectively.Meanwhile,the dynamic responses induced by slug fow,wave fow and annular fow show obvious periodic fuctuations.Furthermore,the dynamic response characteristics under slug flow condition are maximum;the maximum pipe deformation and equivalent stress can reach 4mm and 17.5 MPa,respectively.The principal direction of total deformation is different under various flow patterns.Therefore,the periodic equivalent stress will form the cyclic impact on the pipe wall and affect the fatigue life of the horizontal pipe.The present study may serve as a reference for FSI simulation under gas-liquid two-phase transport conditions.

关键词： gas-liquid two-phase flow volume of fluid model fluid-structure interaction(FSI) dynamic response characteristics

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Numerical simulation of effect of various parameters on atomization in an annular slit atomizer

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Journal of Iron and Steel Research(International) 2023年第6期30卷 1128-1141页

作者： Yi Wang Yi-chen Dang Xiao-qing Chen Bao Wang Zhong-qiu Liu Jian-an Zhou Chang-yong Chen The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

As the width-thickness ratio of the discrete nozzle atomizer’s discrete hole greatly influences the loss of atomizing gas flow rate,the discrete nozzle atomizer was transformed into an annular slit atomizer with the same total nozzle outlet area.A numerical simulation study on the effect of various parameters on the atomization in the annular slit atomizer was carried out by coupling both the large eddy simulation(LES)and volume of fluid(VOF)model,which is based on the applicability of LES in capturing the breakup behavior of transient liquid droplets and the advantage of VOF method in directly capturing the phase interface.The simulation results showed that the increase in the atomization pressure makes the gas gain higher momentum,while the increase in the nozzle intersection angle decreases the distance between the nozzle exit and the computational domain axis.The increase in these two variables results in enhancing the gas-liquid interaction in the primary atomization zone and the formation of more aluminum droplets simultaneously.It is considered that the atomization effect becomes better when atomization pressure is 2.5 MPa,and the nozzle intersection angle is 60°.Industrial tests showed that the aluminum powder prepared by the optimized annular slit atomizer has a finer mean particle size and a higher yield of fine powder.The numerical simulation results agree well with the industrial test data of the powder particle size.

关键词： Annular slit atomizer volume of fluid model Atomization process Atomization pressure Nozzle intersection angle Atomization effect

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