KAJIAN EKSPERIMEN MENGENAI TOPOLOGI DASAR DARI ALIRAN ANNULAR AIR-UDARA PADA PIPA HORISONTAL
nnular A flow pattern is gas-liquid two-phase flow patterns, which liquid surrounds the gas in the middle of the pipe. Annular flow pattern is complex and random phenomenon consisting of many waves with varying speeds. This can result a damage to the piping system, so further study on annular flow p...
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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/124081/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=64200 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | nnular A flow pattern is gas-liquid two-phase flow patterns, which liquid
surrounds the gas in the middle of the pipe. Annular flow pattern is complex and
random phenomenon consisting of many waves with varying speeds. This can
result a damage to the piping system, so further study on annular flow pattern
needs to be done.
The purpose of this study is to determine the basic topology of the air-water
annular flow in horizontal pipes. The research was carried out on pipes with a
diameter of 16 mm and 26 mm and a length of 9.4 m. To observe the topology,
two methods of visual and CECM (Constant Electric Current Method) has been
used. Visual method performed using a high-speed camera in order to determine
the basic characteristics of annular flow. CECM method is a method of using
electrical conductivity in two-phase flow to measure the relative area occupied by
the liquid in the circumferential direction of the cross section. These data were
processed non-linear statistically to get information about the mean liquid holdup,
a PDF (probability distribution function), cross Correlation and PSD (power
spectrum density), wave velocity, and wave number.
From the results of this study concluded that a change in the mean liquid
hold-up, wave velocity, and wave number depends on the liquid and gas
superficial velocity. Mean liquid hold-up reduces to the increasing of superficial
gas velocity and increases to the increasing of superficial liquid velocity. The
wave velocity and wave number increases to the increasing of the superficial
liquid and gas velocity. |
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