CAJ | 학술논문

该文对卧底管系统采用分层流理论模型，立管系统采用分相流理论模型，考虑立管内摩擦压降，结合漂移流速度模型，对初始条件提出一种不需要经验模型的方法，建立了卧底管-立管系统气液严重段塞流的一维瞬态理论模型。对下倾管-垂直立管/悬链线立管两类系统，将数值模拟结果与文献中的实验结果进行对比，研究表明该理论模型对严重段塞流周期和压力波动幅值的数值模拟结果与实验结果吻合良好，而且能够成功地模拟实验中发现的四类流型。在此基础上，利用理论模型进一步对严重段塞流压力波动与周期，立管内气液流体速度、含气率及质量分布特性等进行了数值模拟分析，获得了这些流动参数的变化规律。
해문대와저관계통채용분층류이론모형，립관계통채용분상류이론모형，고필립관내마찰압강，결합표이류속도모형，대초시조건제출일충불수요경험모형적방법，건립료와저관-립관계통기액엄중단새류적일유순태이론모형。대하경관-수직립관/현련선립관량류계통，장수치모의결과여문헌중적실험결과진행대비，연구표명해이론모형대엄중단새류주기화압력파동폭치적수치모의결과여실험결과문합량호，이차능구성공지모의실험중발현적사류류형。재차기출상，이용이론모형진일보대엄중단새류압력파동여주기，립관내기액류체속도、함기솔급질량분포특성등진행료수치모의분석，획득료저사류동삼수적변화규률。
Based on the stratified flow theory in the pipeline and the separated phase theory in the riser, a one-dimensional transient model is presented to simulate the characteristics of gas-liquid severe slugging in a pipeline-riser system, where the frictional pressure drop is taken into consideration, and the drift flux correlation is used as a closure law. In particular, a new method for the initial condition is proposed for solving the transient model. For inclined pipeline-vertical riser/catenary riser systems, the numerical results about periods and pressure fluctuation amplitudes of severe slugging are in good agreement with the experimental results presented in the references, and four types of gas-liquid flow characteristics found in experiments are successfully simulated. Moreover, a further study about pressure fluctuations and periods, velocities, void fractions and mass distributions is presented by use of the present model, and relative variation characteristics are obtained.