基于双向流固耦合的换热管流致振动分析
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摘要
为研究管壳式熔盐空气换热器U型管弯管段受空气冲击诱导振动响应特性,依托中国科学院战略性先导科技专项——钍基熔盐堆核能系统(Thorium Molten Salt Reactor,TMSR)综合仿真实验平台,采用单管双向流固耦合方法进行仿真。计算加速度值与实验值较为吻合,误差范围为-12%~15%,证明了单管双向流固耦合方法分析换热管流致振动问题的可行性。数值模拟还表明:流致振动具有在初始0.06 s时间内空气流动和传热管位移趋于稳定和外扩-回弹的周期性变化等特征,最终将在一微小区间内做"8"字往复运动。
[Background] The molten-salt-air heat exchanger is an important part of thorium molten salt reactor(TMSR) integrated simulation platform based on strategic priority research program of Chinese Academy of Sciences, and the flow-induced vibration problem of heat transfer tube in this heat exchanger is critical. Furthermore, the analysis of fluid-structure interaction is currently few and unreliable. [Purpose] This study aims at the flow-induced vibration response characteristics of U-type heat pipe in shell and tube heat exchangers. [Methods] Numerical simulation was operated based on two-way fluid-structure interaction, and the calculated results are compared with experimental data to judge the feasibility of this method. [Results and Conclusion] The relationship between acceleration values are consistent, the error between experimental data and calculated results is in the range of about-12% to 15%, shows that flow-induced vibration analysis of single-tube based on two-way fluid-structure interaction method is feasible. Numerical simulation has also indicated that in the initial period of 0.06 s air flow and displacement of heat transfer tube tend to be stable, the U-type tube has periodic variation characteristics of expand-rebound. Finally, the reciprocating motion of tube tends to be a shape of number "8".
[Background] The molten-salt-air heat exchanger is an important part of thorium molten salt reactor(TMSR) integrated simulation platform based on strategic priority research program of Chinese Academy of Sciences, and the flow-induced vibration problem of heat transfer tube in this heat exchanger is critical. Furthermore, the analysis of fluid-structure interaction is currently few and unreliable. [Purpose] This study aims at the flow-induced vibration response characteristics of U-type heat pipe in shell and tube heat exchangers. [Methods] Numerical simulation was operated based on two-way fluid-structure interaction, and the calculated results are compared with experimental data to judge the feasibility of this method. [Results and Conclusion] The relationship between acceleration values are consistent, the error between experimental data and calculated results is in the range of about-12% to 15%, shows that flow-induced vibration analysis of single-tube based on two-way fluid-structure interaction method is feasible. Numerical simulation has also indicated that in the initial period of 0.06 s air flow and displacement of heat transfer tube tend to be stable, the U-type tube has periodic variation characteristics of expand-rebound. Finally, the reciprocating motion of tube tends to be a shape of number "8".
引文
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11王安民,葛培琪,段德荣.管内流体诱导锥螺旋弹性管束振动分析[J].自动化仪表,2017,38(5):11-14.DOI:10.16086/j.cnki.issn1000-0380.201705003.WANG Anmin,GE Peiqi,DUAN Derong.Analysis of the in-pipe fluid induced vibration of conical spiral elastic tube bundle fluid induced[J].Process Automation Instrumentation,2017,38(5):11-14.DOI:10.16086/j.cnki.issn1000-0380.201705003.
12 Duan D R,Ge P Q,Bi W B,et al.Numerical investigation on the heat transfer enhancement mechanism of planar elastic tube bundle by flow-induced vibration[J].International Journal of Thermal Sciences,2016,112:450-459.DOI:10.1016/j.ijthermalsci.2016.11.003.
13宋学官,蔡林,张华.ANSYS流固耦合分析与工程实例[M].北京:中国水利水电出版社,2012:3-4.SONG Xueguan,CAI Lin,ZHANG Hua.Fluid-solid coupling analysis and engineering examples based on ANSYS[M].Beijing:China Water&Power Press,2012:3-4.
2 Hofstede E T,Kottapalli S,Shams A.Numerical prediction of flow induced vibrations in nuclear reactor applications[J].Nuclear Engineering and Design,2017,319:81-90.DOI:10.1016/j.nucengdes.2017.04.026.
3 Mahmoud S,Atef M.Flow-induced vibration of three unevenly spaced in-line cylinders in cross-flow[J].Journal of Fluid and Structures,2018,76:367-383.DOI:10.1016/j.jfluidstructs.2017.10.007.
4 Mahmoud S,Atef M.Passive control of flow-excited acoustic resonance in rectangular cavities using upstream mounted blocks[J].Experiments in Fluids,2015,56(4):1-12.DOI:10.1007/s00348-015-1908-8.
5熊盛,刘明珠,荆建平.换热器内部流体诱发振动稳态响应分析[J].噪声与振动控制,2015,35(5):16-20.DOI:10.3969/j.issn.1006-1335.2015.05.002.XIONG Sheng,LIU Mingzhu,JING Jianping.Numerical simulation of the steady vibration response induced by interior flow of heat exchangers[J].Noise and Vibration Control,2015,35(5):16-20.DOI:10.3969/j.issn.1006-1335.2015.05.002.
6冯志鹏,张毅雄,臧峰刚.直管束流固耦合振动的数值模拟[J].应用数学和力学,2013,34(11):1165-1172.DOI:10.3879/j.issn.1000-0887.2013.11.006.FENG Zhipeng,ZHANG Yixiong,ZANG Fenggang.Numerical simulation of fluid-structure interaction for tube bundles[J].Applied Mathematics and Mechanics,2013,34(11):1165-1172.DOI:10.3879/j.issn.1000-0887.2013.11.006.
7冯志鹏,兰彬,臧峰刚,等.传热管在内外流体及间隙作用下的非线性振动特性[J].原子能科学技术,2017,51(1):133-138.DOI:10.7538/yzk.2017.51.01.0133.FENG Zhipeng,LAN Bin,ZANG Fenggang,et al.Nonlinear vibration characteristics of heat transfer tube subjected to internal and external flows and loose support[J].Atomic Energy Science and Technology,2017,51(1):133-138.DOI:10.7538/yzk.2017.51.01.0133.
8 Feng Z P,Jiang N B,Zang F G,et al.Nonlinear characteristics analysis of vortex-induced vibration for a three-dimensional flexible tube[J].Communications in Nonlinear Science and Numerical Simulation,2016,34(9):1-11.DOI:10.1115/ICONE24-60053.
9姜乃斌,臧峰刚,张毅雄.横掠水平管束间气-液两相流流型对流致振动激励的影响[J].核动力工程,2011,32(4):42-45.JIANG Naibin,ZANG Fenggang,ZHANG Yixiong.Flow patterns of air-water two-phase cross a tube bundle and their effect on excitation of flow-induced vibration[J].Nuclear Power Engineering,2011,32(4):42-45.
10季家东,葛培琪,毕文波.换热器内多排弹性管束壳程流体诱导振动响应的数值分析[J].振动与冲击,2016,35(20):85-89.DOI:10.13465/j.cnki.jvs.2016.20.014.JI Jiadong,GE Peiqi,BI Wenbo.Numerical analysis on shell-side flow induced vibration responses of multi-row elastic tube bundles in heat exchangers[J].Journal of Vibration and Shock,2016,35(20):85-89.DOI:10.13465/j.cnki.jvs.2016.20.014.
11王安民,葛培琪,段德荣.管内流体诱导锥螺旋弹性管束振动分析[J].自动化仪表,2017,38(5):11-14.DOI:10.16086/j.cnki.issn1000-0380.201705003.WANG Anmin,GE Peiqi,DUAN Derong.Analysis of the in-pipe fluid induced vibration of conical spiral elastic tube bundle fluid induced[J].Process Automation Instrumentation,2017,38(5):11-14.DOI:10.16086/j.cnki.issn1000-0380.201705003.
12 Duan D R,Ge P Q,Bi W B,et al.Numerical investigation on the heat transfer enhancement mechanism of planar elastic tube bundle by flow-induced vibration[J].International Journal of Thermal Sciences,2016,112:450-459.DOI:10.1016/j.ijthermalsci.2016.11.003.
13宋学官,蔡林,张华.ANSYS流固耦合分析与工程实例[M].北京:中国水利水电出版社,2012:3-4.SONG Xueguan,CAI Lin,ZHANG Hua.Fluid-solid coupling analysis and engineering examples based on ANSYS[M].Beijing:China Water&Power Press,2012:3-4.