流量波动作用下临界热流密度特性理论模型开发与验证

Development and Verification & Validation of Theoretical Model for Critical Heat Flux under Flow Oscillation Conditions

基于微液层蒸干机理和均匀流两相流场瞬态特性模型,建立能够预测通道入口流量波动条件下的瞬态临界热流密度的机理模型并开发了相应的计算程序,采用入口流量稳定和流量波动条件下实验数据对模型进行了验证,表明所开发模型能够较好地预测入口流量波动条件下瞬态临界热流密度,并具有较好的计算精度。

A mechanistic critical heat flux（CHF） model was developed to predict the transient CHF under inlet flow oscillation conditions. The model was proposed based on the sub-layer dryout model and homogeneous two-phase transient flow model. FORTRAN language was used to write the calculation code, which was then verified and validated using experimental data from both steady inlet flow and oscillatory inlet flow conditions. The verification and validation results show that the proposed model has good capability to predict the transient CHF under inlet flow oscillation conditions within a small error range.