A study was undertaken to predict steady flow conditions in two-phase steam/water flows in safety/relief discharge piping systems. The homogeneous-equilibrium model was used for the two-phase flow along with the ASME Steam Tables in subroutine form as a state equation. The approach can also accommodate single-phase flows of superheated steam or subcooled liquid. Subroutines were developed to simulate flows through isentropic area changes, abrupt area changes, adiabatic constant area pipes with friction, valves, two-phase shock waves, and mass addition at pipe junctions. These subroutines were combined to predict conditions in arbitrary complex piping systems. Sample calculations which treat both single line and multiple-branch piping systems are included.
Computational Simulation of High-Speed Steady Homogeneous Two-Phase Flow in Complex Piping Systems
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Bliss, D. B., Quackenbush, T. R., and Teske, M. E. (November 1, 1982). "Computational Simulation of High-Speed Steady Homogeneous Two-Phase Flow in Complex Piping Systems." ASME. J. Pressure Vessel Technol. November 1982; 104(4): 272–277. https://doi.org/10.1115/1.3264217
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