为探究海上浮式生产储油卸油船(floating production storage and offloading,FPSO)爆燃事故加强机制,采用计算流体力学(computational fluid dynamics,CFD)对FPSO爆燃事故进行数值模拟。模拟结果表明,在拥塞度较大的钢架结构区域,火焰...为探究海上浮式生产储油卸油船(floating production storage and offloading,FPSO)爆燃事故加强机制,采用计算流体力学(computational fluid dynamics,CFD)对FPSO爆燃事故进行数值模拟。模拟结果表明,在拥塞度较大的钢架结构区域,火焰速度和爆燃压力急剧增大。为进一步探究复杂钢架结构和管系对爆燃事故的加强机制,搭建半开敞管道甲烷-空气爆燃实验系统。实验结果表明,在爆燃过程中复杂钢架结构和管系能够诱导火焰产生强烈的湍流作用,加快未燃气体的燃烧速度,导致爆燃事故后果加强。结合数值模拟结果与实验结果,为FPSO爆燃事故防治给出建议。展开更多
In order to endow titanium metals with bioactivity and antimicrobial properties, titanium plates were subjected to anodic oxidation treatment in NaCl solutions in this study. The treated titanium metals could induce a...In order to endow titanium metals with bioactivity and antimicrobial properties, titanium plates were subjected to anodic oxidation treatment in NaCl solutions in this study. The treated titanium metals could induce apatite formation in the fast calcification solution, and osteoblasts on the treated titanium surfaces proliferated well as those on the untreated titanium metal surfaces. The treated metals could inhibit S. aureus growth in the microbial culture experiments. It was assumed that Ti-OH groups and Ti-Cl groups formed on the treated titanium surface were responsible for the bioactivity and antimicrobial properties of the metals. The anodic oxidation treatment was an effective way to prepare bioactive titanium surfaces with antimicrobial properties.展开更多
文摘为探究海上浮式生产储油卸油船(floating production storage and offloading,FPSO)爆燃事故加强机制,采用计算流体力学(computational fluid dynamics,CFD)对FPSO爆燃事故进行数值模拟。模拟结果表明,在拥塞度较大的钢架结构区域,火焰速度和爆燃压力急剧增大。为进一步探究复杂钢架结构和管系对爆燃事故的加强机制,搭建半开敞管道甲烷-空气爆燃实验系统。实验结果表明,在爆燃过程中复杂钢架结构和管系能够诱导火焰产生强烈的湍流作用,加快未燃气体的燃烧速度,导致爆燃事故后果加强。结合数值模拟结果与实验结果,为FPSO爆燃事故防治给出建议。
基金Supported by the National Natural Science Foundation of China (Grant Nos. 50672062 and 30870615)Key Programs for Science and Technology Development of Sichuan Province, China (Grant No. 2008SZ0104)Sichuan Youth Science & Technology Foundation, China (Grant No. 09ZQ026-033)
文摘In order to endow titanium metals with bioactivity and antimicrobial properties, titanium plates were subjected to anodic oxidation treatment in NaCl solutions in this study. The treated titanium metals could induce apatite formation in the fast calcification solution, and osteoblasts on the treated titanium surfaces proliferated well as those on the untreated titanium metal surfaces. The treated metals could inhibit S. aureus growth in the microbial culture experiments. It was assumed that Ti-OH groups and Ti-Cl groups formed on the treated titanium surface were responsible for the bioactivity and antimicrobial properties of the metals. The anodic oxidation treatment was an effective way to prepare bioactive titanium surfaces with antimicrobial properties.
