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首页> 外文期刊>International Journal of Heat and Mass Transfer >Two-group interfacial area transport equation coupled with void transport equation in adiabatic steam water flows
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Two-group interfacial area transport equation coupled with void transport equation in adiabatic steam water flows

机译：两组界面区域传输方程与绝热蒸汽水流中的空隙传输方程耦合

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摘要

The two-group coupled model with IATE is benchmarked with the recently available adiabatic phase-change flow datasets. The current state of adiabatic phase-change data is extensively discussed, followed by a thorough review of the two-group two-fluid model and the two-group IATE. The interfacial mass generation models from RELAP5/MOD3.3 are benchmarked and are observed to underpredict the group-2 interfacial mass generation rate which then causes underprediction of void fraction under flashing conditions. A new group-2 interfacial mass generation model is proposed using the mass-energy balance approach where slug bubbles are assumed as a cylinder with a constant width that only grows in the lengthwise direction. The proposed model is implemented to the two-group coupled model with IATE and benchmarked with the flashing datasets where the accuracy of the predicted values is significantly improved. Similar benchmark is carried out for flashing conditions with a near-zero initial void faction and adiabatic phase-change flows with an initial condensing phase followed by a flashing phase. It is observed that due to the lack of interfacial area concentration, the interfacial mass generation model is unable to produce a significant enough interfacial mass generation rate to allow the growth of bubbles. Bubble generation models are implemented to the simulations at flashing inception where improved results are obtained.
机译：双组耦合模型与IAI的是用最近可用的绝热相变流数据集进行基准测试。广泛讨论了绝热相变数据的当前状态，然后彻底审查了双组双流体模型和双组IA型。 Relap5 / Mod3.3的界面质量产生模型是基准测试的，并且被观察到欠阶段-2界面质量产生速率，然后在闪光条件下导致空隙率的欠压。使用质量能量平衡方法提出了一种新的第2组界面大众化模型，其中假设块泡气泡作为恒定宽度的圆柱体，该气体仅在长度方向上生长。所提出的模型用于双组耦合模型，其与闪烁的数据集基准测试，其中预测值的准确性得到了显着改善。对于具有接近零初始空隙派的闪烁条件和具有初始冷凝相的绝热相变流的相似基准，然后进行闪烁阶段。观察到，由于缺失界面区域浓度，界面大规模产生模型不能产生足够的足够的界面质量产生速率，以允许气泡的生长。泡沫生成模型在闪烁的初始化时实现模拟，其中获得了改进的结果。

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