کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
153893 456542 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of sparger geometry on the mechanism of flow pattern transition in a bubble column
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effects of sparger geometry on the mechanism of flow pattern transition in a bubble column
چکیده انگلیسی

Electrical resistance tomography (ERT) is used to measure void fraction wave characteristics and to identify flow pattern in a bubble column reactor (0.24 m diameter, 2.75 m height). The effects of column pressure and superficial gas velocities for different sparger geometry and for different flow pattern have been investigated. The ERT sensor can distinguish the void fraction disturbances in different flow regimes with a good clarity. The holdup derived from ERT is in good agreement with the hold-up values measured by pressure transmitters. Different flow regimes have been identified based on void fraction properties and wall pressure fluctuations. The spectral analysis of ERT measurements yields quantitative information, such as a characteristic time and a characteristic frequency of void fraction waves, which are closely related to flow structure in the prevailing regime. The experimental observations are compared with the literature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 130, Issues 2–3, 1 June 2007, Pages 171–178
نویسندگان
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