仿鲨鳃扰流结构的过渡段换热表面优化设计  

Optimization on thermal surface with rib turbulator inspired by turbulence of alopias′gill in simplified gas turbine transition piece

作　　者：郭昊添 徐涛[1] 梁逍 于征磊 刘欢[1] 马龙[1,3] GUO Hao-tian;XU Tao;LIANG Xiao;YU Zheng-lei;LIU Huan;MA Long(College of Mechanical Science and Engineering,Jilin University,Changchun 130022,China;Key of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China;College of Aviation Warfare Scervice ,Aviation University of Air Force,Changchun 130022,China)

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]吉林大学工程仿生教育部重点实验室,长春130022 [3]空军航空大学航空作战勤务学院,长春130022

出　　处：《吉林大学学报（工学版）》2018年第6期1793-1798,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家科技重点研发计划项目(2018YFB1105100);国家自然科学基金青年基金项目(51505181);中国博士后基金项目(2016M590256);省校共建计划先进制造专项项目(SXGJSF2017-2)

摘　　要：借鉴长尾鲨鳃部呼吸作用时鳃弓的扰流特性及湍流发生机理,设计了带有肋式扰流结构的仿生换热表面,并建立了带有此仿生换热表面的过渡段双腔室模型。利用FLUENT仿真软件进行数值模拟,得到该过渡段冷却腔室内的温度场、速度矢量场及努塞尔数分布。采用全面试验设计建立了关于肋式扰流结构高度和宽度设计变量对换热表面的加权平均温度和最小压强的代理模型,通过粒子群优化算法获得此肋式扰流结构的最佳设计方案。结果表明,带有肋式扰流结构的仿生换热表面能够强化射流冲击冷却,可将过渡段冷却腔室内的冷却效率提升340%。Based on flow characteristics around the gill of alopias,a bionic thermal surface with a rib turbulator was designed in a simplified gas turbine transition piece.The thermal performance of the heat transfer surface with a rib turbulator in a double-chamber model was investigated.The CFD simulation was carried out using software FLUENT to obtain the temperature contour and the velocity vector distribution on the thermal surface.The impinging cooling efficiency and the Nusselt number were computed also.The regression equation about the area weighted average temperature and the minimum pressure on the thermal surface was obtained by using a comprehensive experimental design and regression analysis method to study the effect of height and width of the turbulence generator. The optimal height and width of the ribbed turbulence generator were evaluated by the particle swarm optimization algorithm.The simulation results indicate that the bionic thermal surface can improve the convective heat transfer and the cooling efficiency of the double-chamber is improved by 340%.

关 键 词：工程仿生学 仿生换热表面 数值模拟 优化设计 肋式扰流结构 

分 类 号：TB17[生物学—生物工程]