Experimental Research on Law of Pressure Drop of Gas-liquid Two-phase Spiral Flow in the Horizontal Pipe

Experimental research on flow pattern and pressure drop of gas-liquid two-phase spiral flow in the horizontal pipe are investigated.Three representative flow patterns are obtained,and they are spiral wave stratified flow,spiral bubbly flow and spiral dispersed flow.The effect of flow pattern,volume fraction of air,gas liquid superficial velocity and the parameters of vanes on pressure drop are investigated.The pressure distribution of the cross section are analysed.Experimental results show that the law of pressure drop is closely related to flow pattern,the influence of other factors on pressure drop also should be considered.The gradient of pressure drop of spiral dispersed flow is little,and experimental results are useful for other research and engineering application.