机械密封摩擦副界面热流固耦合分析
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摘要
在符合工况的试验条件下,以对流换热数值计算理论为基础,利用FLUENT完成对流换热系数的数值计算。通过流固耦合分析,得到流固交界面的第二边界条件分布,将所求值作为边界条件,代入热传导方程,利用ANSYS软件计算得到密封端面温度场的分布规律。利用数值法求解对流换热系数,得到各项重要参数对换热过程的影响,补充了实验法的不足。研究了介质流量、转速两个重要参数对对流换热系数及密封环摩擦副界面温度场分布的影响,为改善机械密封端面工作情况提供了一种新的研究方法。
Under the experimental conditions with convective heat transfer numerical calculation based on the theory,it applies numerical methods to realize fluent calculation of convective heat transfer coefficient.The thermal fluid and solid coupling analysis obtains the distribution of accurate fluid-solid interface in a second boundary condition.Taking the obtained value as the boundary condition,it analyzes the heat conduction equation,simulates seal face temperature field in ANSYS.Comparing experimental and numerical methods for solving the convective heat transfer coefficient,it obtains a realistic conditions and more accurate temperature distribution.Based on the seal ring friction interface loads at different temperatures,it simulates different media flow velocity,temperature distribution and thermal deformation distribution at different speed,and the temperature of the seal cavity media distribution.
Under the experimental conditions with convective heat transfer numerical calculation based on the theory,it applies numerical methods to realize fluent calculation of convective heat transfer coefficient.The thermal fluid and solid coupling analysis obtains the distribution of accurate fluid-solid interface in a second boundary condition.Taking the obtained value as the boundary condition,it analyzes the heat conduction equation,simulates seal face temperature field in ANSYS.Comparing experimental and numerical methods for solving the convective heat transfer coefficient,it obtains a realistic conditions and more accurate temperature distribution.Based on the seal ring friction interface loads at different temperatures,it simulates different media flow velocity,temperature distribution and thermal deformation distribution at different speed,and the temperature of the seal cavity media distribution.
引文
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[2]单晓亮,胡欲立.基于ANSYS的机械密封环温度场分析[J].润滑与密封,2006(9):116-119.
[3]王胜军,郝木明,张书贵.机械密封温度场计算[J].化工机械,2004,31(4):203-207.
[4]王志豪,索双富,黄伟峰,等.机械密封对流传热系数数值研究[J].润滑与密封,2011(6):29-33.
[5]张绪猛.船用机械密封的动态特性研究[D].武汉:武汉理工大学,2008:21-22.
[6]周剑锋.机械密封中的热流体动力效应研究[D].南京:南京工业大学,2006:98-108.
[7]张靖周.高等传热学[M].北京:科学出版社,2009.
[8]廖传军,黄伟峰,索双富,等.核主泵机械密封的流固强耦合模型[J].中国科学,2011,41(12):1649-1657.
[9]刘伟,彭旭东,白少先,等.流体静压型机械密封的三维传热数学模型及端面温度分析[J].摩擦学学报,2010(1):57-62.
[10]何永明,穆塔里夫·阿赫迈德,刘毅龙.油泵用机械密封摩擦副界面热-结构耦合分析[J].流体机械,2014(6):21-25.
[11]毛军,张利蓉,丁飞,等.基于FLUENT的叶轮机械内部流场模拟研究[J].煤矿机械,2008,8(8):48-50.
[12]陈汇龙,刘彤,林清龙,等.基于ANSYS接触式机械密封热力耦合的研究[J].流体机械,2012(7):29-32.
[13]吴昊.机械密封热力耦合变形及流场分析[D].兰州:兰州理工大学,2014:9-33.