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Flow Visualization, Heat Transfer, and Critical Heat Flux of Flow Boiling in Earth Gravity with Saturated Liquid-Vapor Mixture Inlet Conditions – In Preparation for Experiments Onboard the International Space StationThis study investigates flow boiling of n-Perfluorohexane with saturated two-phase mixture inlet in a rectangular channel of dimensions 114.6-mm heated length, 2.5-mm width, and 5 mm-height. The experiments were performed as part of the Mission Sequence Testing of the Flow Boiling and Condensation Experiment’s (FBCE) Flow Boiling Module (FBM) in the vertical upflow configuration in Earth gravity using the same experimental system that was launched to the International Space Station (ISS) in August 2021. The operating parameters varied are heating configuration (single- and double-sided), mass velocity (380 – 2400 kg/m2s), inlet quality (0.011 – 0.519), and inlet pressure (120 – 179 kPa). High-speed video photographs are presented to explain the two-phase flow patterns within the channel’s heated length. Flow patterns are constituted by low-density and high-density fronts moving along the channel, with the high-density fronts gradually reducing in length due to evaporation. Heat transfer results in terms of flow boiling curves, streamwise wall temperature profiles, streamwise heat transfer coefficient profiles, and average heat transfer coefficients are presented and trends discussed. CHF data from the present experiments are combined with prior databases to compile a consolidated FBCE-CHF database for saturated inlet to expand the ranges of operating conditions and include other flow orientations in Earth gravity. Experimental CHF trends are also discussed. The interfacial lift-off model shows a good CHF predictive accuracy evidenced by a mean absolute error of 11.97% for this consolidated database after constraining it to mass velocities greater than or equal to 500 kg/m2s. Finally, this study confirmed reliability of the upcoming ISS experiments for saturated inlet conditions and the collected Earth-gravity data will be compared to ISS microgravity data.
Document ID
20220005296
Acquisition Source
Glenn Research Center
Document Type
Accepted Manuscript (Version with final changes)
Authors
V. S. Devahdhanusha
(Purdue University West Lafayette West Lafayette, Indiana, United States)
Steven J Darges
(Purdue University West Lafayette West Lafayette, Indiana, United States)
Issam Mudawar
(Purdue University West Lafayette West Lafayette, Indiana, United States)
Henry K Nahra
(Glenn Research Center Cleveland, Ohio, United States)
R. Balasubramaniam
(Case Western Reserve University Cleveland, Ohio, United States)
Mohammad M. Hasan
(Glenn Research Center Cleveland, Ohio, United States)
Jeffrey R Mackey
(HX5, LLC)
Date Acquired
April 5, 2022
Publication Date
April 2, 2022
Publication Information
Publication: International Journal of Heat and Mass Transfer
Publisher: Elsevier
Volume: 188
Issue Publication Date: June 1, 2022
ISSN: 0017-9310
Subject Category
Earth Resources And Remote Sensing
Instrumentation And Photography
Funding Number(s)
WBS: 619352.06.11.03.05.01
CONTRACT_GRANT: GRC-FN-Visitor-Code LT
CONTRACT_GRANT: PIA-PIP-15-028-A FBCE
CONTRACT_GRANT: SPEC5721
CONTRACT_GRANT: 80GRC020D0003
CONTRACT_GRANT: NNX17AK98G
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Technical Review
Single Expert
Keywords
Flow boiling
Saturated two-phase inlet
Two-phase heat transfer coefficient
High-speed photography
Critical heat flux
Earth gravity
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