Experimental Investigation On Pressure Flactuation And Hydrulic Charectrics Of Two Phase Flow In Rectangular Inclined Tunnels

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Zabolipour, Amir Hossein | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39639 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Borgee, Mahmoud
Abstract:
Two phase slug flow often happens in culvert and water tunnels conveying water from dams and weirs. Having complicated hydraulic properties, little is known about different hydraulic properties of this kind of flow, while most of the previous studies deal with other liquids than water and air, mostly dealing with chemical and mechanical engineering problems. In this paper, the results from experimental study of air/water slug flow due to changing in slope of the conduit from horizontal to 2, 3 and 4% are presented. The conduit has rectangular cross section with dimension cm of Plexiglas material and inclined part. Air is added to the system upstream of the conduit using an air discharge. The experimental set-up includes; digital camera, piezometers and pressure transducers. The results are expressed as graphs and design guides showing the hydraulic changes in the slug (e.g., slug period, slug length and pressure) due to slope change in conduit. Base on results and observations, it showed that increasing air discharge causes pressure drop and slugs appear further from the entrance section. Investigations inclined verification pressure drop and dynamic pressure fluctuations.
Keywords:
Two Phase Flow ; Hydraulic Charachteristics ; Dynamic Pressure ; Slug Flow ; Rectangular Tunnel

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