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

Journal Article · Mon Jan 01 00:00:00 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), Vol. 11:3; ISSN 0145-7632
• Country of Publication: United States
• Language: English

Related Subjects

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