摘要
针对外置电阻式蓄热体在温度载荷下产生热形变致使蓄热体结构不稳定的问题,利用理论推导与有限元数值模拟相结合的方式对蓄热体的热形变及热应力进行分析。通过理论推导不同相变蓄热材料在温度载荷下所产生的热应力及热形变方程,并利用数值模拟的方式对某一工况下的蓄热体热应力数值及分布情况研究,同时进行实际案例分析验证蓄热体内热应力的存在与危害,为蓄热体结构优化设计和工况参数配置提供参考依据。
The thermal deformation and thermal stress of a resistant based regenerator were analyzed by a combination of theoretical analyses and finite element numerical simulations, aimed at the understanding if thermal deformation of the external resistive regenerator could cause unstable structure of the regenerator. The thermal stress and thermal deformation equations of different phase change materials under temperature cycling were deduced theoretically, and the numerical simulations were carried out on the thermal stress and its distribution in the regenerator under a certain working condition(case study). The modelling was validated qualitatively by comparing with the operation of an actual thermal storage body.
引文
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