CAJ | 학술논문

充分考虑入口为过冷水、两相和过热蒸汽等情况下的临界和非临界流动，对摩擦压降、拐角压降以及临界流模型 Henry‐Fauske中的相变起始点进行了修正，开发出破前泄漏（LBB）的管道贯穿裂纹泄漏率计算程序。与目前通用的裂纹泄漏率程序（PICEP和SQUIRT ）分别就常规直管道、人工裂纹以及自然形成裂纹的泄漏率实验数据进行了对比。计算分析表明，该程序计算结果与实验结果吻合较好且精度高于PICEP和SQUIRT。此外，通过计算分析研究，获得了背压和滞止焓以及裂纹形貌（包括局部粗糙度、全局粗糙度及裂纹开口位移、裂纹拐角数目等）对泄漏率的影响规律。
충분고필입구위과랭수、량상화과열증기등정황하적림계화비림계류동，대마찰압강、괴각압강이급림계류모형 Henry‐Fauske중적상변기시점진행료수정，개발출파전설루（LBB）적관도관천렬문설루솔계산정서。여목전통용적렬문설루솔정서（PICEP화SQUIRT ）분별취상규직관도、인공렬문이급자연형성렬문적설루솔실험수거진행료대비。계산분석표명，해정서계산결과여실험결과문합교호차정도고우PICEP화SQUIRT。차외，통과계산분석연구，획득료배압화체지함이급렬문형모（포괄국부조조도、전국조조도급렬문개구위이、렬문괴각수목등）대설루솔적영향규률。
A code was developed to predict the leakage from through pipeline crack of the leak before break (LBB) ,and various stagnation conditions were considered ,inclu‐ding the subcooled water ,the two‐phase fluid and the superheated steam .Both the crit‐ical and non‐critical flows were studied . The Henry‐Fauske critical flowmodel was revised by a newphase transition point and the pressure drops of friction and turns were modified .The code was verified by comparing with the experimental data of convention‐al straight pipe , artificial crack and naturally occurring crack , which shows a good agreement and the code has a higher precision than the existing codes PICEP and SQUIRT .The influence of crack morphology on LBB leakage was discussed ,including the local roughness ,the global roughness ,the crack open displacement and the number of the corners .Besides ,the dependence of the LBB leakage on stagnation enthalpy and back pressure was investigated .