COMPUTATION OF STEADY-STATE MULTIPLE CHOKED COMPRESSIBLE FLOW - AN ANALYTICAL SOLUTION FOR SINGLE-PHASE AND 2-PHASE 2-COMPONENT FLOW

The possibility of multiple choked compressible flow is analysed for t he single-phase gas and two-phase two-component mixture. Two basic cri teria derived from the global mass and energy balance equations and fr om the second law of thermodynamics have been established for describi ng the occurrence of multiple choked flow phenomenon. An analytical co mputational procedure deduced from these criteria is proposed and appl ied to the practical case of flows through a discharge line involving several singularities. Comparisons between simulations and experiments performed with pure nitrogen and nitrogen-water mixture show a good a greement. (C) 1998 Elsevier Science Ltd. All rights reserved.