摘要
为缓解核电厂常见的正交异径三通结构的热疲劳问题,基于数值模拟方法,对比研究了采用斜插式三通结构与传统正交三通结构对高频热震荡湍流混合区域的影响。研究结果表明,在典型射流工况下(动量比为0.43),壁面射流导致顶部温度波动最剧烈,管道周向温度较高;斜插式三通结构有利于加快冷热流体混合,缩短湍流混合长度,从而减小热震荡现象对三通管道产生影响的区域,延长三通管道热震荡引起的疲劳寿命。
For the purpose of addressing thermal fatigue in the conventional vertical T-junction,Having the numerical simulation method based to comparatively investigate the effects of oblique-inserted T-junction configurations and traditional vertical T-junction on the high-frequency thermal oscillation and turbulent mixing characteristics was implemented.The results demonstrate that,under typical jet conditions(momentum ratio is 0.43),wall jets induce the most severe temperature fluctuations at the top region and elevated circumferential temperature gradients.The oblique-inserted T-junction configuration accelerates the mixing of hot and cold fluids and shortens the turbulent mixing length.Consequently,this design can diminish the zone affected by thermal oscillation phenomena,and improve fatigue life of the T-junction subjected to thermal shock.
作者
吴海辉
覃全宁
陈明亚
徐成杰
王志远
赵万祥
彭群家
余伟炜
WU Hai-hui;QIN Quan-ning;CHEN Ming-ya;XU Cheng-jie;WANG Zhi-yuan;ZHAO Wan-xiang;PENG Qun-jia;YU Wei-wei(Taishan Nuclear Power Joint Venture Co.,Ltd.;Suzhou Nuclear Power Research Institute Co.,Ltd.;School of Energy and Power Engineering,University of Shanghai for Science and Technology)
出处
《化工机械》
2025年第6期1002-1007,共6页
Chemical Engineering & Machinery
基金
国家自然科学基金(批准号:U21B2076)资助的课题
国家重点研发计划(批准号:12075274)资助的课题。
关键词
三通管道
热震荡
斜插式
湍流混合区
数值模拟
T-junction
thermal oscillation
oblique inserted structure
turbulent mixing region
numerical simulation
