ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD[J]. Thermal power generation, 2005, (5): 17-19.
ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD[J]. Thermal power generation, 2005, (5): 17-19. DOI: 10.19666/j.rlfd.2005.05.005.
再热器外接管座温度场与热应力的有限元分析
摘要
进行了再热器对空排气管三通管座的温度场和热应力的有限元分析
并选取机组起动后第50min、200min和480min3个点的数据加以讨论。结果发现
由于管道内形成的冷凝水周期性地回流或溢流至再热器外接管内侧
使角焊缝应力集中处形成了热疲劳
并造成管子产生裂纹。
Abstract
The temperature field and thermal stress of tee pipe sockets for exhaust pipes to atmosphere from reheater have been analyzed by using the finite element method
the data at time points of 50
200
and 400 minutes after startup being discussed. It is found from the results that the main cause leading to crack on pipes is as follows: When condensed water in said pipes periodically flows back or overflows to the interior of externally connected pipes on reheater
making the corner welding seams where the thermal stress being concentrated to produce thermal fatigue.