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Film condensation in a horizontal rectangular ductCondensation heat transfer in a horizontal rectangular duct was experimentally and analytically investigated. To prevent the dripping of condensate on the film, the experiment was conducted inside a horizontal rectangular duct with vapor condensing only on the bottom cooled plate of the duct. R-113 and FC-72 (Fluorinert Electronic Fluid developed by the 3M Company) were used as the condensing fluids. The experimental program included measurements of film thickness, local and average heat transfer coefficients, wave length, wave speed, and a study of wave initiation. The measured film thickness was used to obtain the local heat transfer coefficient. The wave initiation was studied both with condensation and with an adiabatic air-liquid flow. The test sections used in both experiments were identical.
Document ID
19930010874
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Lu, Qing (Michigan Technological Univ. Houghton, MI, United States)
Suryanarayana, N. V. (Michigan Technological Univ. Houghton, MI, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NAS 1.26:191061
NASA-CR-191061
E-7550
Accession Number
93N20063
Funding Number(s)
PROJECT: RTOP 506-41-51
CONTRACT_GRANT: NAG3-711
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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