摘要
蒸汽发生器是核反应堆中将一回路热量传递给二回路(水-蒸汽动力回路)的重要设备。二次侧流体冲刷引起的传热管振动是管壁疲劳、磨损直至破裂的主要原因之一。为确保传热管的结构完整,有必要对传热管开展流致振动设计与评价。针对传热管这样的圆柱形结构的流致振动设计与评价,有3种设计规范:GB/T151、TEMA、ASME。本文对3种设计规范中传热管流致振动的设计准则进行了比较,指出了相关准则和参数在计算上的差异以及对流致振动相关机制判定上的差异。选取某典型热交换器为算例,具体展现了3种设计规范对传热管流致振动评价结果的异同,给出了不同规范设计准则的选取对于表征流致振动的特征参数(如附加质量、固有频率、漩涡脱落频率、振幅等)计算结果带来的偏差,并对3种设计规范在工程应用中的保守性提出了参考性建议。结果表明:对不同参数,设计规范保守性不相同,TEMA计算频率相对更为保守,其他参数GB/T151较为保守,TEMA和ASME整体相对GB/T151更加宽容。
The steam generator is an important device in the nuclear reactor to transfer the heat of the primary circuit to the secondary circuit(water-steam power circuit).The heat-exchange tube vibration caused by the secondary side fluid flushing is one of the main causes of tube wall fatigue,wear and tear.In order to ensure the structural integrity of the heat-exchange tube,it is necessary to carry out flow-induced vibration design and evaluation of the heat-exchange tube.For the design and evaluation of flow-induced vibration of a cylindrical structure such as a heat-exchange tube,there are three design codes including GB/T151,TEMA and ASME.The comparison of the design criteria for flow-induced vibration of heat-exchange tubes in three design codes was made,and the differences in the calculation of relevant criteria and parameters and the difference in the determination of the mechanism related to flow-induced vibration were pointed out.A typical heat exchanger was selected as an example to demonstrate the similarities and differences between the three design codes for the flow-induced vibration evaluation of heat-exchange tubes.The deviations of the calculation results of characterizing the characteristic parameters of flow-induced vibration(such as additional mass,natural frequency,vortex shedding frequency,amplitude,etc.)were given for the selection of different design criteria of codes,and the reference suggestions for the conservativeness of the three design codes in engineering applications were pointed out.The results show that for different parameters,the design codes are not the same in conservative property.The calculation of frequency based on TEMA is relatively more conservative.The other parameters in GB/T151 are more conservative.TEMA and ASME are more tolerant than GB/T151.
作者
王聪
陆道纲
曹琼
王园鹏
WANG Cong;LU Daogang;CAO Qiong;WANG Yuanpeng(School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China;Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy,Beijing 102206,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2019年第8期1433-1438,共6页
Atomic Energy Science and Technology
基金
国家自然科学基金青年科学基金资助项目(11805069)
中央高校基本科研业务费专项资金资助项目(JB2019035,JB2019015)
