IDEALS Home University of Illinois at Urbana-Champaign logo The Alma Mater The Main Quad

An Investigation of Void Fraction in the Stratified/Annular Flow Regions in Smooth, Horizontal Tubes

Show full item record

Bookmark or cite this item: http://hdl.handle.net/2142/11887

Files in this item

File Description Format
PDF TR144.pdf (1MB) ACRC Technical Report 144 PDF
Title: An Investigation of Void Fraction in the Stratified/Annular Flow Regions in Smooth, Horizontal Tubes
Author(s): Graham, D.M.; Kopke, H.R.; Wilson, M.J.; Yashar, D.A.; Chato, J.C.; Newell, T.A.
Subject(s): two-phase flow annular flow stratified flow intermittent flow horizontal gas-liquid flow void fraction
Abstract: Refrigerants R134a and R410A have been used for void fraction measurements in smooth horizontal tubes with diameters between 4mm and 7mm. Quality and mass flux were varied from 5% to 90% and 75 kglm2-s to 700 kglm2-s, respectively. Two test loops, one for condensing flows at 35C and the other for evaporating flows at 5C, were used in the investigation. Results show that near the transition from annular to stratified flow void fraction changed from viscousinertial dependence to gravitational-inertial dominated dependence. An important feature observed is the annular flow region's relative insensitivity to mass flux while the border region between annular and stratified flows is characterized by strong mass flux dependence.
Issue Date: 1999-01
Publisher: Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report: Air Conditioning and Refrigeration Center TR-144
Genre: Technical Report
Type: Text
Language: English
URI: http://hdl.handle.net/2142/11887
Sponsor: Air Conditioning and Refrigeration Project 74
Date Available in IDEALS: 2009-05-22
 

This item appears in the following Collection(s)

Show full item record

Item Statistics

  • Total Downloads: 585
  • Downloads this Month: 12
  • Downloads Today: 1

Browse

My Account

Information

Access Key