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A Study of Non-Equilibrium Two-Phase Pressure Drop in Converging Channels Supplied With Atomized Liquid

[+] Author Affiliations
J. D. Schwarzkopf

Isothermal Systems Research, Inc.

C. T. Crowe, B. Q. Li

Washington State University

Paper No. IMECE2006-15634, pp. 541-547; 7 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 1
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4784-5 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


Two-phase pressure drop measurements are very difficult to make while the fluid is in non-equilibrium condition (i.e. while phase change is occurring). This is further complicated by the fact that supplying the channels with an initial quality comprised of atomized liquid and entrained gas changes the presupposed trends. The purpose of this paper is to present methods of measurement for fluctuating two-phase pressure drop in converging mini-channels with phase change (i.e. in the heat acquisition zone), an initial quality, and varying heat fluxes. The inlet and exit hydraulic diameters of the converging channel are 1.55mm and 1.17mm respectively and the fluid was PF5050. A numerical model was developed to understand the parameters contributing to the trends identified in the data. The numerical model includes the momentum effects of droplets from entrainment and atomization. The model shows good agreement with the experimental data.

Copyright © 2006 by ASME



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