Film Boiling Heat Transfer from a Round Wire to Liquid Hydrogen Flowing Upward in a Concentric Annulus
- Shiotsu, M.
- Shirai, Y.
- Oura, Y.
- Horie, Y.
- Yoneda, K.
- Tatsumoto, H.
- Hata, K.
- Kobayashi, H.
- Naruo, Y.
- Inatani, Y.
Publication date
December 2015
DOI Publisher
The Authors. Published by Elsevier B.V.Abstract
AbstractHydrogen film boiling heat transfer coefficients were measured for the heater surface superheats up to 400K under pressures from 400 to 1100kPa, liquid subcoolings from 0 to 11K and flow velocities up to 7 m/s. The test wire used was 1.2mm in diameter and 120mm in length made of PtCo (0.5wt.%) alloy, which was located at the center of 8mm diameter conduit made of FRP (Fiber Reinforced Plastics). The heat transfer coefficients were higher for higher pressure, higher subcooling and higher flow velocity. The heat transfer coefficients were about 1.6 times higher than those predicted by Shiotsu-Hama equation for forced flow film boiling in a wide channel. Discussions were made on the mechanism of difference between them
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