To investigate the reflooding cooling process under conditions of partial exposure in a narrow rectangular channel,experiments were conducted under various residual water level conditions with different thermal-hydraulic parameters(mass flow rate,initial wall temperature,inlet subcooling,and input heat flux density).The study revealed differences between the reflooding process under partial exposure state and complete exposure state.By analyzing the transient temperature characteristics of the reflooding process under different conditions,the variation patterns of the key parameters of reflooding cooling and the quench temperature were examined.The results indicate that the duration of quench cooling under partially exposure state is significantly shorter than complete exposure state.It is observed that the quench temperature increases with the inlet subcooling,mass flow rate,and residual water level height.Furthermore,based on the dimensionless treatment method of the Π theory,a predictive model for the quench temperature under partially exposure conditions is proposed.The predictive correlation ensures that 90% of the experimental data falls within±10% error margins.
关键词
矩形窄通道/再淹没/局部裸露/骤冷温度
Key words
rectangular narrow channel/reflooding/partially exposure state/quench temperature
维普
万方数据