Abstract Experiments were conducted utilizing a 0.025 m diameter Foam Characterization Rig (FCR) skid. Aqueous foam was used in the experimental program, utilizing both Drill Foam F-450 and SI-403 surfactants to generate the foam. Foam generation and characterization experiments were conducted with different foam generation devices, with the aim of identifying the optimal configuration, which generates the most stable foam. A comparison between the foam quality and inlet gas volume fraction (IGVF) demonstrates that these variables are close to each other at 90% IGVF (vsg = 0.09 m/s) owing to the occurrence of homogenous flow for this condition. The data also confirm that the foam generation configuration with two 125 μm mesh size and 3 mm beads generates the most stable foam. Three different flow patterns were observed in the pipe, namely, stratified, dispersed and slug flow, exhibiting different foam quality. Foam flow in pipes experiments revealed that the gas shear effect on foam break-up depends on the existing flow pattern in the pipe. For stratified wavy flow, increasing the superficial gas velocity can lead to either increasing or decreasing foam breakup efficiency, which depends on the gas velocity. On the other hand, in slug flow, generally increasing the superficial gas velocity results in slightly decrease in the foam breakup efficiency.

中文翻译：

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管道中的泡沫生成、表征和分解

摘要 使用直径为 0.025 m 的泡沫表征钻机 (FCR) 撬进行了实验。在实验程序中使用了水性泡沫，利用 Drill Foam F-450 和 SI-403 表面活性剂来产生泡沫。泡沫生成和表征实验使用不同的泡沫生成设备进行，目的是确定最佳配置，从而生成最稳定的泡沫。泡沫质量和入口气体体积分数 (IGVF) 之间的比较表明，由于在此条件下出现均匀流动，这些变量在 90% IGVF (vsg = 0.09 m/s) 下彼此接近。数据还证实，具有两个 125 μm 网孔尺寸和 3 mm 珠子的泡沫生成配置生成的泡沫最稳定。在管道中观察到三种不同的流动模式，即，分层、分散和段塞流，表现出不同的泡沫质量。管道中的泡沫流动实验表明，气体剪切对泡沫破裂的影响取决于管道中现有的流动模式。对于分层波浪流，增加表观气体速度会导致泡沫破裂效率的增加或降低，这取决于气体速度。另一方面，在段塞流中，通常增加表观气体速度会导致泡沫破裂效率略有下降。这取决于气体速度。另一方面，在段塞流中，通常增加表观气体速度会导致泡沫破裂效率略有下降。这取决于气体速度。另一方面，在段塞流中，通常增加表观气体速度会导致泡沫破裂效率略有下降。