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 Station
نویسندگان
چکیده
This study investigates flow boiling of n-Perfluorohexane with saturated two-phase mixture inlet in a rectangular channel dimensions 114.6 mm heated length, 2.5 width, and 5 mm-height. The experiments were performed as part the Mission Sequence Testing Flow Boiling Condensation Experiment's (FBCE) Module (FBM) vertical upflow configuration Earth gravity using same experimental system that was launched to International Space Station (ISS) August 2021. operating parameters varied are heating (single- double-sided), mass velocity (380–2400 kg/m2s), quality (0.011–0.519), pressure (120–179 kPa). High-speed video photographs presented explain patterns within channel's length. constituted by low-density high-density fronts moving along channel, gradually reducing length due evaporation. Heat transfer results terms curves, streamwise wall temperature profiles, heat coefficient average coefficients trends discussed. CHF data from present combined prior databases compile consolidated FBCE-CHF database for expand ranges conditions include other orientations gravity. Experimental also interfacial lift-off model shows good predictive accuracy evidenced mean absolute error 11.97% this after constraining it velocities greater than or equal 500 kg/m2s. Finally, confirmed reliability upcoming ISS collected Earth-gravity will be compared microgravity data.
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2022
ISSN: ['1879-2189', '0017-9310']
DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2022.122890