An experimental investigation of thermally induced flow instabilities in a convective boiling upflow system

Hongtan Liu, S. Kakac

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The two-phase flow instabilities in a single channel, forced convection, open loop, up-flow system have been investigated experimentally using R-11 as the working fluid. The effects of mass flow rate, heat input, inlet liquid temperature and upstream compressible volume on two-phase flow instabilities have been investigated. Two heater surfaces were tested at five different heat inputs with constant inlet temperature, and four different inlet temperatures with constant heat input. For each case, the mass flow rate was varied over a wide range covering the entire scope for boiling two-phase flows. Experiments were also conducted at different compressible volumes, with constant heat input, inlet fluid temperature, and average mass flow rate. The oscillations of inlet mass flow rate, heater inlet pressure, and heater wall temperature were recorded. The effects of mass flow rate, inlet liquid temperature and heat input on the amplitudes and periods of inlet pressure and thermal oscillations are presented in tabular and graphical forms.

Original languageEnglish
Pages (from-to)365-376
Number of pages12
JournalWärme- und Stoffübertragung
Volume26
Issue number6
DOIs
StatePublished - Nov 1 1991

Fingerprint

mass flow rate
boiling
Boiling liquids
heat
two phase flow
Flow rate
heaters
inlet pressure
inlet temperature
Two phase flow
Temperature
pressure oscillations
oscillations
working fluids
forced convection
wall temperature
Intake systems
liquids
Fluids
upstream

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes
  • Engineering(all)

Cite this

An experimental investigation of thermally induced flow instabilities in a convective boiling upflow system. / Liu, Hongtan; Kakac, S.

In: Wärme- und Stoffübertragung, Vol. 26, No. 6, 01.11.1991, p. 365-376.

Research output: Contribution to journalArticle

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