Visual Observation of Flow Regime Transition in Downward Vertical Gas-Liquid Flow Using Simple Mixer

سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 381

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شناسه ملی سند علمی:

JR_GPJU-4-1_005

تاریخ نمایه سازی: 21 دی 1400

چکیده مقاله:

Different flow patterns of downward gas-liquid two-phaseflow using simple mixer are studied in an experimental manner. An experimental setup is designed and fabricated to allow the visual observation of downward two-phase flow patterns and their transitions. The flow patterns are recorded by a ۱۲۰۰ frames per second high speed video camera. The quality of downward two-phase flow patterns photos are improved through image processing. The setup includes a transparent vertical pipe of ۵۰ mm diameter and the (L/d) aspect ratio of ۸۰. Flow patterns are obtained through ۳۷۴ test cases during which air and water superficial velocities changed. In order to assess the performance of the mixer, all expected flow patterns are obtained. The four observed flow regimes are: of falling film, bubbly, slug and froth. The flow map is plotted and transitions among different flow patterns are compared with previous finding in specified conditions indicating a good agreement was observed.

نویسندگان

Farhad Raeiszadeh

School of Mechanical Engineering, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran and Drilling Research Center, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Ebrahim Hajidavalloo

School of Mechanical Engineering, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran and Drilling Research Center, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Morteza Behbahaninejad

School of Mechanical Engineering, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran. and Research Center of Gas Distribution Network, College of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Pedram Hanafizadeh

School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

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