CAJ | 학술논문

气液两相流临界热通量对工业设备的安全性有重要影响，液膜干涸模型是预测气液相环状流临界热通量的有效方法。确定环状流起始点、初始和平衡状态的携带份额、携带现象的发生条件、液滴沉积率以及携带率对模型的计算精度都起着决定性的作用。通过大量研究目前已经得到了适用于不同条件下的经验关联式来预测此模型中的大多数参数，然而环状流起始点的初始携带份额至今仍需通过假设来确定。以广泛应用于核工业的临界热通量查询表为依据，针对界限含气率区间建立环状流液膜干涸模型，对使模型计算值满足查询表工况的初始携带份额进行分析，拟合得到其与Weber数及液相Reynolds数的关联式，预测值偏差大多在±30%内。
기액량상류림계열통량대공업설비적안전성유중요영향，액막간학모형시예측기액상배상류림계열통량적유효방법。학정배상류기시점、초시화평형상태적휴대빈액、휴대현상적발생조건、액적침적솔이급휴대솔대모형적계산정도도기착결정성적작용。통과대량연구목전이경득도료괄용우불동조건하적경험관련식래예측차모형중적대다수삼수，연이배상류기시점적초시휴대빈액지금잉수통과가설래학정。이엄범응용우핵공업적림계열통량사순표위의거，침대계한함기솔구간건립배상류액막간학모형，대사모형계산치만족사순표공황적초시휴대빈액진행분석，의합득도기여Weber수급액상Reynolds수적관련식，예측치편차대다재±30%내。
The critical heat flux (CHF) of gas-liquid flow plays an important role in the safety of industrial equipment. At present, the liquid film model is widely used for predicting critical heat flux in gas-liquid annular flow. It consists of onset of annular flow, entrainment fraction for the onset point and the equilibrium state, inception criteria for droplet entrainment, droplet deposition and entrainment rates, which all have decisive effect on prediction accuracy. Most parameters in this model can be determined by some empirical correlations valid under different conditions. However, up to now, the entrainment fraction for the onset of annular flow is always assumed. In this paper, the normalized data of the 2006 CHF look-up table adopted widely, especially in the nuclear industry, were used. The liquid film model was built for the limiting quality region. The entrainment fraction at the onset of annular flow was obtained when the predicted CHF of the model met the values in the look-up table. The empirical correlation including the Weber number and the Reynolds number of liquid was provided. Its prediction could mostly make the errors within ±30%.