1. 西安交通大学动力工程多相流国家重点实验室,西安,710049
2. 墨尔本皇家理工大学航空、机械与制造学院,维多利亚,墨尔本,澳大利亚,3083
网络首发:2011-12-10,
纸质出版:2011
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段欣悦 1, 2, 厉彦忠 1, 等. 两种群体平衡模型在大规模多粒径泡状流中的应用研究[J]. 西安交通大学学报, 2011,45(12):92-98.
Application of Two Population Balance Models to Predicting Large Scale Multi-Size Bubbly Flow[J]. 2011, 45(12): 92-98.
为了研究大规模多粒径泡状流流动特性
考虑到气泡聚并、破裂等微观机制现象对气泡尺寸、数密度等宏观参量的影响
分别采用两种基于群体平衡方程的数学模型——群数密度传递(BNDT)模型与多气泡组质量传递(MUSIG)模型
对具有聚并主导趋势特征的多粒径气液泡状流实验MTLOOP进行数值模拟
并与实验进行了对比研究
结果发现:两种群体平衡模型均可以较准确地捕捉到多粒径泡状流中气泡尺寸变化趋势以及含气率分布特征转换
且预测精度相当; 与MUSIG模型相比
BNDT模型计算时间节省了1/20~1/10
因此更适用于火箭工程中大型气液泡状流的工程预测.
Aiming at investigating fluid flowing behaviours in large scale multi-size bubbly flow
two population balance models
named Bubble Number Density Transfer(BNDT)model and Multi-Size-Group(MUSIG)model coupled with bubble coalescence and breakage mechanism respectively
are employed to simulate the MTLOOP(Multi-phase Loop)experiment with characteristics of coalescence dominating trends. In comparison to experimental data
both models are able to well capture the dynamic evolution trends of bubble diameter and transition of gas volume fraction distribution
but the computing period of BNDT gets shorter by 1/10~1/20 than that of MUSIG under the similar predictions
thus BNDT model is more appropriate for predicting large scale multi-size bubbly flow in rocket engineering.
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