کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
157031 456957 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Local bubble size distribution, gas–liquid interfacial areas and gas holdups in an up-flow ejector
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Local bubble size distribution, gas–liquid interfacial areas and gas holdups in an up-flow ejector
چکیده انگلیسی

Particle image velocimetry (PIV) was used to measure local bubble size distributions (BSD), gas–liquid interfacial areas and gas holdups in an up-flow ejector, based on the water–air system with different liquid and gas flow rates under the presence/absence of the swirl body. The results show that the bubble flow patterns are different whether to add the swirl body into the nozzle, especially at low gas flow rate because the bubbles formed “bubble chain” in the ejector with swirl. The mean bubble sizes D32 of the two are both related to the pressure drop between import and export, gas ratio and liquid flow. The interfacial area and D32 are both mainly dependent on the local gas holdups. The mean bubble sizes in the absence of swirl body are smaller than that in the presence of swirl under different operating conditions. The gas holdups and interfacial area are larger with swirl than those without swirl. With the increase of the gas fraction, the differences of D32, at and eG become smaller.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 65, Issue 18, 15 September 2010, Pages 5264–5271
نویسندگان
, , , , ,