METHOD FOR DIMENSIONING INDUSTRIAL INSTALLATIONS WHERE A TWO-PHASE GAS-LIQUID MIXTURE FLOWS IN AN INTERMITTENT REGIME

摘要

Method for dimensioning industrial installations where a two-phase gas-liquid mixture flows in an intermittent regime.;The flow behavior is modeled for each phase within a gas pocket and a liquid slug with the help of physical models. The flow of a gas flow entrained behind a gas pocket is also measured with the help of a physical model. It is considered for this model that the pressure variation between the rear of a gas pocket and a liquid slug behind this pocket is responsible for the entrainment, and a critical condition for the entrained gas flow is taken into account. The load losses within the pipe are then determined with the help of an iterative method in which this entrained gas flow thus modeled is adjusted with an average gas flow obtained by a conversion equation for flows in established intermittent flow behavior. The dimensions for industrial installations are thereby determined that minimize load losses.;Application to the transport of petroleum fluids and in particular to the dimensioning of production pipes, risers, etc.