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利用旋转平台对逆载作用下矩形通道内汽水两相流临界换热进行了实验研究。通过改变逆载大小、入口流体过冷度、流体质量流速等参数,获得了静止和逆载作用2种状态下矩形管道内汽水两相流临界换热实验数据。实验结果表明,质量流速随着加热时间的增长而减小,进出口压差则反之;临界状态下,质量流速随着逆载、过冷度的增大而减小;进出口压差随着逆载、质量流速的增大而增大,随着过冷度的增大而减小;临界热流密度值随着逆载、质量流速、入口过冷度的增大而增大;其中逆载对临界热流密度的影响最为显著,在逆载从0g~2.5g变换范围内,临界热流密度可提高50%。
The rotating platform was used to study the critical heat transfer of two-phase flow of soda and water in a rectangular channel under reversed loading. The experimental data of critical heat transfer of two-phase flow of soda and water in a rectangular pipe under static and reversed loading were obtained by changing the parameters of the magnitude of the back-loading, the degree of subcooling of the inlet fluid and the mass flow rate of the fluid. The experimental results show that the mass flow rate decreases with the increase of heating time and the pressure difference between inlet and outlet is opposite. In the critical condition, the mass flow rate decreases with the increase of the reverse load and the degree of undercooling. The results show that the critical heat flux density increases with the increase of the reverse load, the mass flow rate and the entrance undercooling, and the inversely loaded and mass flow rate increases with the increase of undercooling. The most significant impact on the critical heat flux density, in the reverse load from 0g ~ 2.5g transformation range, the critical heat flux density can be increased by 50%.