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1)  flow regimes and flow regime transitions
流型和流型转变
2)  flow pattern transition
流型转变
1.
The numerical analysis shows flow pattern transition location propagates downstream ward for lower void fraction while .
从一维气液两相流守恒方程出发 ,应用气液两相流漂移流模型 ,推导了空泡率双曲型守恒方程 ,用特征线法数值求解气液两相流空泡率分布的传播过程 ,对传播稳定性和流型转变进行讨论 。
3)  flow regime transition
流型转变
1.
Superficial velocity of each phase,as the onset of slugging occurs,was predicted,and theoretical analysis was conducted on the stratified to slug flow regime transition.
根据气液两相流一维波模型建立分层流向段塞流转变的判别准则,对水平管内气液两相流出现段塞流时的各相临界表观速度进行了理论预测,并对流型转变进行了分析。
2.
The influence of the variation in gas-liquid interfacial friction factor on the prediction of flow regime transition was analyzed.
54cm水平管内空气-水两相流出现段塞流时的各相临界表观速度和临界液层高度进行了理论预测,并且分析了气液两相界面的摩擦因子对于预测流型转变的影响。
4)  flow pattern transition
流型转换
5)  regime transition
流型转化
1.
The flow regime transition criteria from bubbly flow to slug flow for the boiling water two-phase flow in horizontal rectangular narrow channels(1 mm、20 mm,2 mm、20mm) were investigated experimentally and theoretically.
在漂移流模型的基础上得出了泡状流向弹状流转化的流型转化准则,并与实验数据进行了初步比较,二者符合较好。
6)  flow pattern transition
流型转化
1.
The effects of liquid properties on flow pattern transition and pressure drop during gas-liquid flow are experimentally investigated.
实验结果表明对于较低液相粘度的气液两相流动,液相物性对水平管中塞状流向弹状流的转化以及倒U型管中下降管内的环状液膜流动向间歇流动的转化有一定的影响,但对水平管中分层波状流动向间歇流动的转化以及倒U型管中上升管内的流型转化影响很小。
2.
Based on 61 groups of conductance fluctuating signals in vertical upward oil-water two-phase flow,the relationship between chaotic attractor morphological characteristics and oil-water two-phase flow pattern transition was investigated by placing reference sections in the chaotic attractor field.
研究结果表明,油水两相流混沌吸引子形态特征量对流型转化敏感,有助于理解油水两相流流型转化的非线性动力学机制。
3.
Study on annular multiphase flow pattern transition considering gas hydrate phase transition is one of the key research subjects on studying wellbore hydrodynamics during deep water drilling.
含天然气水合物相变的环空多相流流型转化机制的研究,是深水油气及天然气水合物藏钻探过程中,井筒内流体力学计算的关键问题之一。
补充资料:流型
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性质:流体在装置内流动的模样。它表示出流体质点运动的轨迹及速度分布。通常可在透明装置内用照相法描述出来。反应工程中常用的两种理想流型是活塞流流型和全混流流型。气液两相流中有波流、环流、层状流、冲击流、雾流等流型。圆管内层流流型为抛物线速度分布;湍流流型的速度分布服从卡曼-普兰德1/7指数定律。流型属于物理模型的范畴,它是决定反应器传递模型的基础。

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