An experimental and theoretical study of density wave and pressure drop oscillations

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Heat Transfer Engineering; (USA)

DOI:https://doi.org/10.1080/01457639008939734· OSTI ID:6545919

Yuncu, H ^[1]

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1. Middle East Technical Univ., Ankara (Turkey)

A study of the stability of an electrically heated, forced-convection, single horizontal channel system with a gas-loaded surge tank placed upstream of the heated channel was conducted. Freon 11 was used as the test fluid. The major modes of oscillations, namely, density wave-type (high-frequency) and pressure drop-type (low-frequency)oscillations, have been observed. Steady-state pressure drops, stable and unstable boundaries are experimentally determined for given ranges of heat flux, mass flow rate, and compressible volume in the surge tank. An analytical model has been developed to predict stable and unstable boundaries for the pressure drop and density wave oscillations of the boiling two-phase flow system. The model is based on homogenous flow assumption and thermodynamic equilibrium between the liquid and vapor phases. The governing equations are solved first to establish the steady-state behavior of the system. This solution is then used to obtain the unsteady solution by perturbation technique.

• OSTI ID: 6545919
• Journal Information: Heat Transfer Engineering; (USA), Journal Name: Heat Transfer Engineering; (USA) Vol. 11:3; ISSN 0145-7632; ISSN HTEND
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ANALYTICAL SOLUTION
COMPRESSIBLE FLOW
CONTAINERS
CONVECTION
DATA
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUID FLOW
FLUIDS
FORCED CONVECTION
GASES
HEAT FLUX
HEAT TRANSFER
INFORMATION
INTEGRAL TRANSFORMATIONS
LAPLACE TRANSFORMATION
LIQUIDS
MASS TRANSFER
NUMERICAL DATA
PHASE STUDIES
PRESSURE DROP
SOLIDS
STEADY-STATE CONDITIONS
TANKS
THEORETICAL DATA
THERMODYNAMICS
TRANSFORMATIONS
TWO-PHASE FLOW
VAPORS