| 光透法定量两相流中流体饱和度的模型及其应用 |
| 摘要点击 2099 全文点击 1285 投稿时间：2013-09-30 修订日期：2013-12-23 |
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| 中文关键词 孔隙介质 NAPL 气体 光透法 模型 |
| 英文关键词 porous media NAPL gas light transmission method model |
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| 中文摘要 |
| 基于光透法定量流体饱和度的原理及其在两相流中的应用，设计了两组密封砂箱实验来研究气体或重非水相流体 （DNAPL）在饱和孔隙介质中的迁移，观察了气体或DNAPL在孔隙介质中的迁移规律，应用并验证了2个水/气两相流中的光强-饱和度 （LIS）模型，特别是建立并应用了适用于NAPL/水两相流系统的2个新LIS模型. 结果表明，气体以不规则的"指状"通道向上迁移直到在砂箱顶部聚集，最终形成连续的气体分布；TCE由于自身重力的影响向下迁移直至砂箱底部，最终在砂箱中形成不规则的污染羽并在砂箱底部形成污染池. 利用实验结果应用并验证4个光透法模型得到：2个水/气系统中LIS模型（WG-A和WG-B）整体适用于本实验数据；2个NAPL/水系统的LIS模型（NW-A 和NW-B）得到与实测资料较吻合的结果，其中基于单个孔隙水驱替假设的模型NW-A与实验结果更加接近，对量化多孔介质中的NAPL/水系统各相饱和度具有一定的参考意义. |
| 英文摘要 |
| Based on light transmission method in quantification of liquid saturation and its application in two-phase flow system, two groups of sandbox experiments were set up to study the migration of gas or Dense Non-Aqueous Phase Liquids (DNAPLs) in water saturated porous media. The migration of gas or DNAPLwas monitored in the study. Two modified Light Intensity-Saturation (LIS) models for water/gas two-phase system were applied and verified by the experiment data. Moreover two new LIS models for NAPL/water system were developed and applied to simulate the DNAPL infiltration experiment data. The gas injection experiment showed that gas moved upward to the top of the sandbox in the form of 'fingering' and finally formed continuous distribution. The results of DNAPL infiltration experiment showed that TCE mainly moved downward as the result of its gravity, eventually formed irregular plume and accumulated at the bottom of the sandbox. The outcomes of two LIS models for water/gas system (WG-A and WG-B) were consistent to the measured data. The results of two LIS models for NAPL/water system (NW-A and NW-B) fit well with the observations, and Model NW-A based on assumption of individual drainage gave better results. It could be a useful reference for quantification of NAPL/water saturation in porous media system. |
