Plume Stability During Direct Contact Condensation of Steam in a Crossflow of Subcooled Water, at High Mass Flux and With a Small Nozzle Diameter

Author:

Alden Zach R.1,Maples Gunnar D.1,Dressler Kristofer M.1,Nellis Gregory F.2,Berson Arganthaël1

Affiliation:

1. Multiphase Flow Visualization and Analysis Laboratory, University of Wisconsin – Madison, 1500 Engineering Drive, Madison, WI 53706

2. Solar Energy Laboratory, University of Wisconsin – Madison, 1500 Engineering Drive, Madison, WI 53706

Abstract

Abstract The stability of a steam plume during direct-contact condensation into a crossflow of subcooled water is investigated for mass fluxes that are higher (>600 kg/m2s) and a nozzle diameter (2.4 mm) that is smaller than typically seen in the literature. The transition from a stable steam plume to an unstable plume associated with the formation and collapse of steam bubbles is characterized by high-speed imaging and high-frequency pressure measurements. Four regimes are observed: stable, condensation oscillation, transition, and unstable. A regime map and spectral signatures of the different flow regimes are provided. Results are compared with correlations from the literature, which are typically derived for lower mass fluxes, larger nozzles, and injection into stagnant pools of water.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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