固体颗粒对水力旋流器冲蚀磨损特性的影响
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摘要
针对工业污水处理系统中水力旋流器壁面的冲蚀磨损问题,采用FLUENT软件中RSM模型和DPM模型模拟水力旋流器内液、固两相流的流动情况,并以Grant和Tabakoff碰撞模型求解器壁冲蚀磨损速率。研究了不同颗粒流速、粒径和质量流量条件下器壁冲蚀磨损规律以及最大冲蚀磨损位置。结果表明:旋流器壁面最大冲蚀磨损率随着颗粒流速的增大而呈指数递增,与质量流量呈正相关关系,但与颗粒粒径呈不完全线性增长关系;旋流器壁面冲蚀磨损率随着颗粒流速、粒径和质量流量的改变而不同,其中颗粒流速变化的影响最大、质量流量次之、粒径的影响最小;固体颗粒碰撞和磨削旋流器壁面而引起局部磨损,并且影响最大冲蚀磨损区域的出现位置。
With respect to the erosion wear problem of hydrocyclone wall in the industrial sewage treatment system,the liquidsolid two-phase flow inside the hydrocyclone was simulated using Reynolds stress model and discrete phase model in the CFD software Fluent,and the erosion wear rate of the hydrocyclone wall was calculated using the Grant and Tabakoff collision model.The erosion wear rules and the maximum erosion wear location of the hydrocyclone wall were studied under the conditions of different particle velocity,particle size and mass flow rate. The results show that the maximum erosion wear rate of hydrocyclone wall increases exponentially with the increase of particle velocity,and is positively correlated with mass flow rate,but it presents a relation of incomplete linear increase with the increase of particle size. The erosion wear rate of the hydrocyclone wall varies with the varying particle velocity,particle size and mass flow rate,among them the effect of particle velocity is biggest,the mass flow rate next,and the effect of particle size is smallest. Collision and ablation of solid particles on hydrocyclone wall cause local erosion on hydrocyclone wall and influence the occurring location of the maximum erosion wear area.
With respect to the erosion wear problem of hydrocyclone wall in the industrial sewage treatment system,the liquidsolid two-phase flow inside the hydrocyclone was simulated using Reynolds stress model and discrete phase model in the CFD software Fluent,and the erosion wear rate of the hydrocyclone wall was calculated using the Grant and Tabakoff collision model.The erosion wear rules and the maximum erosion wear location of the hydrocyclone wall were studied under the conditions of different particle velocity,particle size and mass flow rate. The results show that the maximum erosion wear rate of hydrocyclone wall increases exponentially with the increase of particle velocity,and is positively correlated with mass flow rate,but it presents a relation of incomplete linear increase with the increase of particle size. The erosion wear rate of the hydrocyclone wall varies with the varying particle velocity,particle size and mass flow rate,among them the effect of particle velocity is biggest,the mass flow rate next,and the effect of particle size is smallest. Collision and ablation of solid particles on hydrocyclone wall cause local erosion on hydrocyclone wall and influence the occurring location of the maximum erosion wear area.
引文
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[3]王江云,冯留海,张果,等.单入口双进气道旋风分离器内冲蚀特性[J].石油学报(石油加工),2016,32(2):289-296.
[4]卢梦媚,蒋明虎,赵立新,等.内嵌小锥结构固液分离旋流器磨蚀的数值模拟[J].流体机械,2017,45(12):13-17.
[5]袁惠新,殷伟伟,付双成,等.介质黏度对旋流器壁面磨损的数值模拟研究[J].食品工业,2015,36(12):189-193.
[6]袁惠新,张衍,吕凤霞,等.物性参数对旋流器壁面磨损的数值模拟研究[J].食品工业,2017,38(4):233-237.
[7]朱红钧,林元华,谢龙汉.FLUENT12流体分析及工程仿真[M].北京:清学大学出版社,2011:6-18.
[8]Mokni I,Dhaouadi H,Bournot P,et al.Numerical investigation of the effect of the cylindrical height on separation performances of uniflow hydrocyclone[J].Chemical Engineering Science,2015(122):500-513.
[9]Peng W S,Cao X W. Influence of pipe parameters on flow field of liquid-solid two-phase flow and erosion of pipe bend[J]. J. Chin. Soc.Corros. Prot.,2016,36(1):87-96.
[10]Finnie I,Mcfadden D H.On the velocity dependence of the erosion of ductile metals by solid particles at low angles of incidence[J].Wear,1978,48(1):181-190.
[11]Frawley P,Corish J,Niven A,et al. Combination of CFD and DOE to analyse solid particle erosion in elbows[J].International Journal of Computational Fluid Dynamics,2009,23(5):411-426.
[12]Grant G,Tabakoff W.Erosion prediction in turbomachinery resulting from environmental solid particles[J].Journal of Aircraft,1975,12(5):471-478.
[13]Lin Z,Ruan X D,Zhu Z C,et al.Numerical study of solid particle erosion in a cavity with different wall heights[J].Powder Technology,2014,254:150-159.
[14]袁惠新,殷伟伟,黄津,等.固液分离旋流器壁面磨损的数值模拟[J].化工进展,2015,34(3):664-670.
[15]魏耀东,刘仁桓,燕辉,等.蜗壳式旋风分离器的磨损实验和分析[J].化工机械,2001,28(2):71-75.
[16]王君,李天敏,刘宏杰,等.新型旋流喷射式真空泵及其工作特性的研究[J].流体机械,2018,46(5):40-43.
[17]蒋明虎,刑雷,张勇.基于离散相运移轨迹的新型旋流入口结构设计[J].流体机械,2017,45(10):42-46.
[18]邱发成,全学军,徐飞.水力喷射空气旋流器中射——旋流耦合流场的模拟分析[J].流体机械,2017,45(9):16-21.
[19]熊伟成,李英军,张永东,等.大空间会议厅空调气流组织数值的模拟与实测研究[J].流体机械,2017,45(9):66-70.
[20]马光飞,吴燕明,方勇,等.涡流装置固相冲洗特性三维多相流动数值模拟[J].排灌机械工程学报,2018,36(4):334-339.
[21]王海渠,李红,邹晨海.旋流式射流泵装置性能试验研究[J].排灌机械工程学报,2017,37(4):283-288.
[22]付露莹,王锐,张有林.食品包装材料研究进展[J].包装与食品机械,2018,36(1):51-56.
[22]李菲,张岩,崔萌萌.聚乙烯醇基抗菌包装材料的研究进展[J].包装与食品机械,2018,36(2):58-62.
[24]Silva P D,Briens C,Bernis A. Development of a new rapid method to measure erosion rates in laboratory and pilot plant cyclones[J].Powder Technology,2003,131(8):111-119.