Flashing two-phase flow including the effects of noncondensable gases

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910544· OSTI ID:5516181

Leung, J C; Epstein, M ^[1]

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1. Fauske and Associates, Inc., Burr Ridge, IL (USA)

The theoretical treatment of two-phase compressible flow through nozzles dates back to the work of Tangren et al. and Starkman et al. where classical homogeneous equilibrium flow models were presented for the nonflashing flow case and the flashing flow case, respectively. These reference models were recast recently in the form of simple correlations characterized by only a few dimensionless physical parameters. To the authors knowledge, the case of flashing two-phase flow in the presence of noncondensable gases has not been treated in the literature. This case can be viewed as a hybrid flow between the flashing regime and the nonflashing regime. This type of flow is often encountered at metering devices in chemical processing and in relief valve sizing applications where both condensable (flashing) component and noncondensable component co-exist. An example would be to consider the pressure relief situation of a hydrogenation reaction mixture containing gaseous hydrogen and an organic solution at elevated pressure. For the extreme case of an inlet subcooled liquid under an imposed gas pressure in the reservoir, the effect of the gas partial pressure is known to have a significant effect in augmenting the flow and can be readily quantified. The purpose of this paper is to present an exact solution method for this flashing liquid/gas mixture as well as an approximate analytical solution adequate for most engineering applications.

• OSTI ID: 5516181
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 113:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ANALYTICAL SOLUTION
FLOW MODELS
FLUID FLOW
MATHEMATICAL MODELS
NOZZLES
NUMERICAL SOLUTION
TWO-PHASE FLOW