Steady State Numerical Model For Critical
Two-phase Flow In A Nozzle
Author(s)
S. Martel, Y. Mercadier & M. Dostie
Abstract
This paper presents a steady state two-phase flow model including new choking
criteria for one-dimensional conservative systems. As a first step, this model is
used to study the flow in the motive nozzle of an ejector. Mechanical
disequilibria and momentum exchange between phases are taken into account
and the numerical scheme uses the SIMPLE algorithm. Numerical results are
compared to experimental and previous numerical results from the literature.
Keywords: critical two-phase flow, critical location, steady state model.
1 Introduction
The steady state flow of compressible fluid through convergent-divergent
nozzles covers various important flow phenomena like the occurrence of critical
flow conditions, transition from subsonic to supersonic flow or the occurrence of
flow discontinuities. One phenomena still of interest is the choking condition in a
critical flow such as in supersonic ejectors. Supersonic ejectors are widely used
in a range of applications such as aerospace, propulsion, refrigeration and many
thermal systems. In this paper, a one-dimensional compressible steady state twophase
flow model is presented with new choking criterions that are directly
related to optimal flux conditions developed by [1]. As a first step, this model is
used to study the flow in the motive nozzle of an ejector.
Keywords
critical two-phase flow, critical location, steady state model.
Related Book
Other papers in this volume
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