Two-phase flow distributions in the merged pipe distributor have still remained mal-uniformity problem and the causes have not clearly discovered yet. Therefore, the enhancement study is needed, absolutely. The experi...Two-phase flow distributions in the merged pipe distributor have still remained mal-uniformity problem and the causes have not clearly discovered yet. Therefore, the enhancement study is needed, absolutely. The experimental was carried out upon the distributor constructed by acrylics resembling merged triple pipe, 8 mm in diameter of inlet channel and two set 5 mm in diameter of each outlet channel, set horizontally sideways. Three flow patterns were fed, i.e., bubble, slug and stratified flow, observed via high speed video camera. The pressure distribution was measured by series of U-tube water gauge manometer. The flow patterns, phase distribution and pressure drop were analyzed by CFD software, validated by experimental data and compared by existing correlation, analytically. The experiment is extended by modeling, in order to vary three inclinations of distributor： horizontally, 45° and vertically up-ward as well as to vary three outlet channel lengths with length ratio lc/dc： 3.2, 10 and 70. It was revealed that the two-phase flow distribution tends to be mal-uniform and to transform to different flow pattern in outlet channels. These are promoted by different： outlet channel length, feeding two-phase flow pattern in inlet distributor and inclination angle. The changing of flow pattern is driven by fluctuating velocity in both upper and lower outlet channel.展开更多
文摘Two-phase flow distributions in the merged pipe distributor have still remained mal-uniformity problem and the causes have not clearly discovered yet. Therefore, the enhancement study is needed, absolutely. The experimental was carried out upon the distributor constructed by acrylics resembling merged triple pipe, 8 mm in diameter of inlet channel and two set 5 mm in diameter of each outlet channel, set horizontally sideways. Three flow patterns were fed, i.e., bubble, slug and stratified flow, observed via high speed video camera. The pressure distribution was measured by series of U-tube water gauge manometer. The flow patterns, phase distribution and pressure drop were analyzed by CFD software, validated by experimental data and compared by existing correlation, analytically. The experiment is extended by modeling, in order to vary three inclinations of distributor： horizontally, 45° and vertically up-ward as well as to vary three outlet channel lengths with length ratio lc/dc： 3.2, 10 and 70. It was revealed that the two-phase flow distribution tends to be mal-uniform and to transform to different flow pattern in outlet channels. These are promoted by different： outlet channel length, feeding two-phase flow pattern in inlet distributor and inclination angle. The changing of flow pattern is driven by fluctuating velocity in both upper and lower outlet channel.
