THE IMPLEMENTATION OF IMAGE PROCESSING TECHNIQUE TO DETERMINE THE INTERFACIAL BEHAVIOR OF GAS-LIQUID WAVY TWO-PHASE FLOW IN A HORIZONTAL PIPE
An experiment has recently been conducted to study the flow behavior of stratified gas-liquid two-phase flow in a horizontal pipe. It was aimed to determine the interfacial behavior of stratified gas-liquid two-phase flow, and also, developed a high quality database of it. The longitudinal section o...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2013
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/126895/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=67132 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | An experiment has recently been conducted to study the flow
behavior of
stratified gas-liquid two-phase flow in a horizontal pipe. It was aimed to determine
the interfacial behavior of stratified gas-liquid two-phase flow, and also, developed
a high quality database of it. The longitudinal section of transparent acrylic
horizontal pipe (26 mm i.d.) was used as the reference section of image recording.
Air and water were used as the test fluids, flowing cocurrently inside the pipe. To
ensure the flow become stratified two-phase flow, a separated inlet by a flat plate
was used in the mixing section. The flow behavior was recorded by using a high
speed video camera around 5 m in axial distance from the inlet pipe to ensure the
fully-developed stratified gas-liquid two-phase flow. To correct the refraction due
to the acrylic pipe, correction box was used in the visualization test section.
The group of stratified smooth, stratified ripple, stratified roll, and
pseudo-slug were successfully recorded and classified based on the visualization
study from 24 couples of the test condition of water superficial velocity and air
superficial velocity. The recorded images were digitized on a computer. Digital
image processing techniques were then used to perform quantitative analysis and
the results were used to evaluate the existing data.
In this study, image processing technique was performed to obtain and plot
data of liquid hold-up distribution, power spectral density, cross correlation and
probability distribution function of a liquid hold-up of the flow. From these result,
the behavior of stratified smooth and stratified wavy two-phase flow was discussed.
Based on the power spectral density analysis, it was found that, the wave frequency
increases as the water superficial velocity increases, meanwhile, the air superficial
velocity does not play an important role on the wave frequency. |
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