چكيده به لاتين
Three phase flow is the most important flow that occur in the oil, gas and petrochemical industrial. One of the most important problems in design of pipe lines, separation and gathering system sizing of flow transfer pipe lines, design of heat exchangers and also design of gas condensate lines is the calculation of current velocity, pressure drop and also hold up of multi-phase flow.
So development of appropriate model for prediction of above mentioned parameters has special importance. There is less publication on three phase flow rather than two phase flows. In this research three phase layer flows in horizontal pipes and slug flow in inclined and vertical pipes have been modeled. For this modeling mechanistic method is used and continuity and momentum equation for three phase flow are solved and the results are compared to the experimental data.
In modeling of stratified flow, using the developed velocity profile, more excellent estimation was research. Using this analytically model, the effect of pipe slope, gas and liquid velocity on the slug length was assessed. Also in this research changes of liquid hold up in slug zone and in different volume ratio were considered. Also the effect of pipe slop on pressure drop in slug flow is seen in this research. Using the models, effect of oil viscosity and gas velocity on pressure drop and liquid hold up have been considered.
The diversion of modeling result in Teitel model for three phase flow was 10% and in two phase flow, 11% diversion in pressure drop and 17% in hold up data were seen. In slug flow, diversion from experimental data is 15% for inclined pipes and 22% for vertical pipes.
The comparison of modeling and experimental result show the good conformity of this model with real threat of fluid and this makes the model more trustable.
