水沙流作用下粗糙度对圆柱体结构受力特性及冲蚀的影响  

Effect of roughness on the force and erosion of cylindrical structures under water-sand two phase flow

作　　者：乔智威 刘壮 张宪堂[1,2] 张惠尧 李泽熹 李丹 QIAO Zhiwei;LIU Zhuang;ZHANG Xiantang;ZHANG Huiyao;LI Zexi;LI Dan(Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;Shandong Hi-Speed Qingdao Expressway Co. Ltd, Qingdao, Shandong 266114, China;College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China)

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590 [2]山东科技大学土木工程与建筑学院,山东青岛266590 [3]山东高速青岛公路有限公司,山东青岛266114 [4]山东科技大学地球科学与工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2021年第3期44-49,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51874189,51709161);山东省自然科学基金项目(ZR2017MEE043);山东省研究生教育创新计划项目(SDYY15086,SDYY15088)。

摘　　要：基于Fluent软件建立三维模型,采用SST k-ω湍流模型,对含沙量在0.05、0.5和5 kg/m^(3),柱体表面粗糙度在0、0.1%D、0.3%D、0.5%D、0.8%D和1%D时单圆柱绕流的柱体的受力特性及冲蚀进行数值模拟,研究了不同含沙量水流作用下,粗糙度对圆柱的平均阻力系数、升力系数及冲蚀率的影响。结果表明:在同一含沙量的水流作用下,柱体的升力系数在粗糙度为0.5%D时达到最大值;当柱体表面粗糙度相同时,平均阻力系数受水沙流含沙量的影响较小,升力系数受含沙量的影响较大;在不同含沙量的水沙流作用下,圆柱体结构的壁面冲蚀率在粗糙度为0.3%D时达到最大值。This study investigates the effect of roughness on the average drag coefficient,lift coefficient and erosion rate of cylinders under different sand content flows by carrying out numerical simulations of the force and erosion when the sand content is 0.05,0.5,and 5 kg/m^(3),and the column surface roughness is 0.1%D,0.3%D,0.5%D,0.8%D,and 1%D with the three-dimensional shear stress transport(SST)k-ωturbulence model based on Fluent.The results show that under the action of water flow with the same sand content,the lift coefficient reaches its maximum value when the roughness is 0.5%D,that when the roughness is the same,the average resistance coefficient is less affected by the sand content of the water-sand two phase flow while the lift coefficient is more affected by the sand content,and that under the effect of the water-sand two phase flow with different sand contents,the wall erosion rate of the cylindrical structure reaches the maximum when the roughness is 0.3%D.

关 键 词：水沙流 粗糙度 圆柱体结构 受力特性 冲蚀率 

分 类 号：TV131[水利工程—水力学及河流动力学]