uclear power technology in the thermal-hydraulicNote 1: all kinds of pressure drop calculation method is the use of presentation1) Todreas groupLow-pressure systemAir - liquid mixtureLockhart-MarttinelliHigh-pressure waterp> 200psialbm / (h · ft50.5 10G>×2)Thom (Marttinelli-Nelson)General relationshipThat liquid metalBaroczyAnalytical expressionHigh gas rate, high pressureHigh flow rate, simpleUniform flow2) The following article the author or organization:ESDU, 1977;IDSINGU, 1973;FRIEDEL, 1976;BRYCE, 1977;WHALLEY, 1980;EPRI (Electric Power Research Institute), TR-113189, "drop design and analysis methods," August 1999.3) WHALLE Y of recommendation (from Collier and Thome68 pages)WHALLE Y (1980) evaluated the separation with large amounts of data flow model, we recommend the following relationship:For/1000:fgμμ

<(1979) relationship with FRIEDEL;For/1000G100:fgμμ>>AndWith the recent improvement of Chisholm (1973) relationship;For/1000G <100:fgμμ>AndWith Lockhart-Marttinelli (1949) Relations andMarttinelli-Nelson (1948) relationship.For most fluid and operating conditions,/fgμμ1,000 or less, preferred FRIEDEL relationship.1/2

Page 222.313Nuclear power technology in the thermal-hydraulicReferences:ESDU (1977), "The gravitational component of pressure gradient for two-phase gasor vapor / liquid flow through straight pipes "Engineering Science Data Unit, London

Idsinga, W. (1975), "An assessment of two-phase pressure drop correlations for steam-watersystems ", MsC Thesis, MIT - Department of Nuclear Engineering, May.Friedel, L. (1975), "Momentum exchange and pressure drop in two-phase", proceedings NATOAdvanced Study Institute, Istanbul, Turkey, 16-27 August, I, 239-312. Hemisphere Pub. Corp.(Also see Appendix B, P. Whalley "Boiling Condensation and Gas-Liquid Flow", Oxford, 1987).Bryce, WM (1977), "A new flow dependent slip correlation which gives hyperbolic steam-watermixture flow equation ", AEEW-R 1099.Whalley, PB (1980), Private Communication to GF Hewitt

CHF:Ishii,shah,martinel,bowring john c chen, merilo, bjornard, berglez, tong, groevneld,