论文部分内容阅读
介绍在高温、高压热工实验装置上进行的垂直上升流条件下一种特殊的非对称加热—单侧加热窄缝矩形通道临界热流密度(CHF)实验研究。实验研究了质量流速、临界含汽量等参数对单侧加热矩形通道CHF的影响规律。研究结果表明,在实验参数范围内,单侧加热与双侧加热的CHF值相差不大,且两者的变化规律基本一致:即在其他热工参数保持不变的情况下,单侧加热CHF随临界含汽量的增加而减小,随入口过冷度的增加而增大;在较低含汽量范围内,单侧加热CHF随质量流速的增加而增大;在较高含汽量范围内则趋势相反。本文提出的单侧加热矩形通道CHF计算关系式在参数范围内计算精度良好。
A special asymmetric heating - experimental study on the critical heat flux density (CHF) of a narrow rectangular channel with one side heating under vertical ascending flow at high temperature and high pressure thermal experiment equipment is introduced. The effects of mass flow rate, critical steam content and other parameters on the uniaxial heated channel CHF were studied experimentally. The results show that within the experimental parameters, unilateral heating and bilateral heating CHF value is not much difference, and the two changes are basically the same: that other thermal parameters remain unchanged, unilateral heating CHF Decreases with the increase of critical gas content, and increases with the increase of inlet undercooling. In the lower gas content range, CHF with one side increases with the increase of mass flow rate, The trend is opposite in range. In this paper, the unilateral heated rectangular channel CHF calculation of the relationship between the parameters in the calculation accuracy.