Community Research and Development Information Service - CORDIS


This report describes a steady state homogenous equilibrium model (HEM) that can be applied to the design of emergency pressure relief systems involving compressible flashing flows. The relief system may comprise an inlet nozzle (between vessel and vent pipe inlet), an inlet pipe with various fittings (bends, etc), a safety valve and a tailpipe with fittings including area changes. Multiple choking may occur in such systems and the model includes a procedure for dealing with this situation. The equations of the model have been assembled into a computer program called VLINE and this program is applied to a practical relief system to illustrate its usefulness in design.

Additional information

Authors: KUHN H, JRC Ispra (IT);MORRIS S D, JRC Ispra (IT)
Bibliographic Reference: EUR 15951 EN (1994) 47pp., FS
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT)
Record Number: 199411380 / Last updated on: 1995-03-21
Original language: en
Available languages: en