本文采用ANSYS软件对插管式内翅片管的高温应力特性进行了数值研究，数值模拟结果表明，高温是产生大应力和大应变的主要原因，在内翅片与内管焊接的部位存在较大的应力区，在焊接过程中要保证此处的焊接质量，插管式内翅片管相对于传统内翅片管具有大幅降低热应力的优点，同时在承受高压方面也比原表面回热器具有更大的优势。
In the present paper, the high temperature stress characteristic of internally finned bayonet tube is numerically studied. The results indicate that high temperature is the main factor to cause large stress and deformation. The large stress happens in the joint of inner fins and inner tubes, so the welding quality of the joint must be ensured. Due to the significant potential of reducing thermal stress, the bayonet structure is superior to the traditional tube for use in the high temperature heat exchanger. Furthermore, it is more suitable for use in the high pressure environment than primary surface recuperator.
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