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This paper seeks to improve upon current design practice in compressible subsonic flow by presenting a practical method for estimating the mass flowrate - pressure drop characteristics of compressible gas-liquid mixtures flowing through pipeline restrictions. An important feature of this method is that it can be applied for all two-phase Mach numbers up to 1. Guidance is also given on the choice of two-phase discharge coefficient for different restriction types. Furthermore, this method is based on a realistic physical model of two-phase flow which includes the effects of phase slip and liquid entrainment and therefore seeks to provide a good representation of the flow. The predictions of the method are compared with a number of experimental data sets for air-water flows through nozzles and air-water and air-oil flows through orifice plates. These comparisons demonstrate close agreement and support the use of the method for process plant design/performance calculations.

Additional information

Authors: MORRIS S D, JRC Ispra (IT)
Bibliographic Reference: Paper presented: INTERFLUID - 1st International Congress on Fluid Handling Systems, Essen (DE), Sept. 10-12, 1990
Availability: Available from (1) as Paper EN 35721 ORA
Record Number: 199011704 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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