Modelling of Turbulent Dispersion in Two Phase Flow Jets
Modelling of Turbulent Dispersion in Two Phase Flow Jets
复制标题
两相流射流中的湍流扩散建模
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
P. Oliveirab
中科院分区：
文献类型：
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作者：
R. Issaa;P. Oliveirab
本文介绍了一个专门为两相流发展的湍流模型在同轴受限空气射流中颗粒弥散预测中的应用。在该模型中，描述分散两相流的传输方程在欧拉框架中使用相分数加权量进行系综平均。除了单相流中类似的平均过程所产生的结果之外，两相流中的平均过程还产生了许多地形。这些额外的条款上的预测particle分散的效果进行评估，通过比较计算与现有的数据的情况下，两个同轴的射流，其中之一是颗粒载货。结果表明，平均方程中的两项是决定计算弥散率的主要因素。它们还表明，假设的粒子响应涡波动对这些预测有显着的影响。
The paper describes the application of a turbulence model especially developed for twophase flows to the pred:iction of dispersion of partic1es in co-axial confined air jets. In this model, the transport equations describing dispersed two-phase flow in an Eulerian frame are ensemble averaged using phase-fraction weighted quantities. A number of terros arise from the averaging process in two-phase flow in addition to those which result from a similar averaging process in single-phase flow. The effect of these additional terms on the prediction of partic1e dispersion is evaluated by comparing calculations with existing data for the case of two co-axial jets, one of which is particle laden. The results show that two terms in the averaged equations are mainly responsible in determining the computed rate of dispersion. They also show that the assumed partic1e response to eddy fluctuations has a marked influence on these predictions.