KAJIAN EKSPERIMENTAL PENGARUH TEGANGAN PERMUKAAN TERHADAP MEKANISME TERBENTUKNYA ALIRAN CINCIN (ANNULAR FLOW) PADA ALIRAN DUA FASA CAIR-GAS DI PIPA HORISONTAL
| Main Authors: | , prasetyo, , Dr.Eng. Deendarlianto, S.T., M.Eng. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/127306/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=67555 |
Daftar Isi:
- Annular flow is widely found in geothermal application, either on the pipe with a vertical and horizontal pipe. Due to the difference in density, the gas velocity is faster than the liquid velocity. This condition will form an annular flow. Because of differences in temperature and pressure, the surface tension of the fluid will change. The purpose of this present study is to investigate the effect of surface tension on annular mechanism. This study will use visualization method, time varying liquid hold-up, probability distribution function, wave velocity, wave number, and frequency dominant with power spectra density method in a horizontal liquid-gas on annular two-phase flow. To variate the liquid surface tension, different ratio of mixed liquid has been added with buthanol. In the present work, time variation of liquid hold-up in a horizontal liquid-gas annular flow (16 mm ID and 9.5 m in total length) has been investigated experimentally. It was investigated by measuring the instantaneous local liquid hold-up by using a Constant Electric Current Method (CECM). Here we used three pairs of liquid hold-up sensors arranged with an axial spacing of 215 mm. The wave velocity was computed by using the cross correlation of two successive liquid hold-up sensors. As a result it was found that the liquid hold-up signal obtained by Constant Electric Current Method (CECM) can be used to determine the liquid hold-up profile and the wave velocity of annular flow. The surface tension has an important role on the liquid hold-up and wave velocity.