Title: Experimental Research on Gas-Liquid Two-Phase Spiral Flow in a Horizontal Pipe
Abstract: In order to study the flow characteristics of gas-liquid two-phase spiral flow in a horizontal pipe,experimental investigation on gas-liquid two-phase spiral flow with 10%~90% gas volume fraction,0.01~3.4 m/s gas superficial velocity and 0.05~2.7 m/s liquid superficial velocity was conducted.The flow patterns under different conditions were analyzed and classified based on high-speed camera records and reference of related investigation results;flow pattern map of gas-liquid two-phase spiral flow in a horizontal pipe was presented;the effect of different velocities and different original spin parameters on flow characteristics,such as pressure drop,flow pattern attenuation,spiral distance and spiral diameter,were investigated.Experimental results are as follows: The flow patterns appeared in the horizontal pipe may be divided into spiral wave stratified flow(SWS),spiral bubbly flow(SB),spiral slug flow(SS),spiral linear flow(SL),spiral axial flow(SA) and spiral dispersed flow(SD).Among these patterns,the linear flow,axial flow and dispersed flow are three new kinds of flow patterns,which is obtained by comparison between the flow pattern map obtained in experiment and classical Mandhane flow pattern map.The distribution of bubbly flow is basically constant,but the distribution of stratified flow changes.When the gas flow rate is less than 2 m/s,linear flow and dispersed flow appear rather than laminar flow.Along with the increase of liquid velocity,the two-phase flow loss gradually increases,the attenuation of flow type becomes weak,spiral distance gradually increases,spiral diameter gradually decreases.In addition,with the increase of vane angle or with the decrease of vane area,the flow pattern transition boundary moves towards the direction of gas intake rate increasing.When gas intake quantity is constant,the flow pattern transition boundary of the same flow pattern moves towards the direction of liquid feed rate increasing along with the increase of vane angle or with the decrease of vane area.At last,the pressure drop gradually increases with the increase of original spin angle or with the decrease of vane area.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 4
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