Convective Heat Transfer Enhancement Due to Gas Injection Into an Impinging Liquid Jet

An experimental parametric investigation has been performed to assess the effect of gas injection on convective heat transfer from a constant heat flux surface to an impinging liquid jet in the absence of boiling. Capillary tubes were inserted into a planar nozzle and extended to a point near the no...

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Bibliographic Details
Published in:Journal of heat transfer 1995-11, Vol.117 (4), p.1011-1017
Main Authors: Zumbrunnen, D. A, Balasubramanian, M
Format: Article
Language:English
Subjects:
Convection and heat transfer
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Jets
Multiphase and particle-laden flows
Nonhomogeneous flows
Physics
Turbulent flows, convection, and heat transfer
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Summary:An experimental parametric investigation has been performed to assess the effect of gas injection on convective heat transfer from a constant heat flux surface to an impinging liquid jet in the absence of boiling. Capillary tubes were inserted into a planar nozzle and extended to a point near the nozzle opening along the nozzle midplane. Air was used as the gas phase and water was used as the liquid phase. The air was injected into the capillary tubes and combined with the water to form a two-phase jet. Convective heat transfer coefficients were enhanced by factors as high as 2.2 near the stagnation line and 1.6 at a distance of five jet widths with no discernible change in pressure drop in the water supply system. Results are generalized and referenced to conditions for single-phase, liquid jet correlations to facilitate heat transfer estimations in applications.
ISSN:0022-1481
1528-8943
DOI:10.1115/1.2836275