KAJIAN EKSPERIMEN MENGENAI TOPOLOGI DASAR DARI ALIRAN ANNULAR AIR-UDARA PADA PIPA HORISONTAL

• Main Authors: , GUNTUR PURNAMA, , Dr. Deendarlianto, S.T., M,Eng.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• 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
• Institution: Universitas Gadjah Mada

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.