基于TC/TGO/BC界面为理想余弦波形的新型涂层双管系统在热机载荷下的传热和应力分析  

Thermal Transmit and Stress Analysis of a Novel Coated Steam Dual Pipe System Under Thermo-Mechanical Loading Based on Ideal Cosine Wave of TC/TGO/BC Interface

作　　者：郭晓峰[1] 张开宇 秦磊 庞自强 Guo Xiaofeng;Zhang Kaiyu;Qin Lei;Pang Ziqiang(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;Baotou No.1 Thermal Power Plant,China Huaneng Group Co.,Ltd,Baotou 014060,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]北方联合电力有限责任公司包头第一热电厂,内蒙古包头014060

出　　处：《稀有金属材料与工程》2022年第1期260-265,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51805274)。

摘　　要：采用有限元顺次耦合的方法,开展了热机载荷作用下新型涂层双管系统传热和应力分析,初步研究了关键特征参量对系统传热和应力分布的影响。结果表明:在稳态工作条件下,热障涂层为主蒸汽管道提供了足够的隔热保护,但由温度梯度产生的热应力对系统结构完整性产生了很大影响;系统中环向应力远大于径向应力,最大环向应力出现在TGO/BC界面靠近TGO侧的余弦波峰处;此外,TC层厚度、TC层热膨胀系数、冷却蒸汽的温度和压力决定了系统的温度和应力分布。Using a sequentially coupled simulation procedure, the thermal transfer and stress analysis of a novel coated steam dual pipe system under thermo-mechanical loading were carried out. The influences of key characteristic parameters on the temperature and stress distribution of the system were investigated. The results show that under steady state working conditions, the thermal barrier coating contributes to the effective thermal insulating protection for the primary steel pipe, but the thermal stress generated due to the significant temperature gradient has a significant impact on the structural integrity of the system. The hoop stress in the system is much larger than the radial stress, and the maximum hoop stress is located at the cosine peak of the TGO/BC interface near the TGO side. In addition, the thickness of the TC, the thermal expansion coefficient of the TC, and the temperature and pressure of the cooling steam determine the temperature and stress distribution of the system.

关 键 词：涂层双管系统 有限元分析 热生长氧化物 

分 类 号：TG174.453[金属学及工艺—金属表面处理] TQ174.758.16[金属学及工艺—金属学]