2026-03-15T20:17:51Z https://gunma-u.repo.nii.ac.jp/oai

oai:gunma-u.repo.nii.ac.jp:00003143 2023-06-19T13:10:46Z 572:575:576

スケール付着面上での単一液滴の蒸発挙動と伝熱特性 Evaporation Behaviors of a Water Droplet and Heat Transfer on the Heated Surface Contaminated by Scale Adherence Evaporation Behaviors of a Water Droplet and Heat Transfer on the Heated Surface Contaminated by Scale Adherence 稲田, 茂昭 宮阪, 芳喜 佐久本, 政和 茂木, 郁男 日本機械学会 本文データは学協会の許諾に基づきCiNiiから複製したものである Phase Change Evaporation Behavior Water Droplet Contaminated Surface Scale Adherence Wetability Wall Temperature Variation Evaporation Mode application/pdf Journal Article The present report aims at presenting basic data to prove the wetability of a heated surface contaminated by scale adherence by comparing the behaviors of a water droplet on a contaminated surface and a glossy surface polished by emery paper. A water droplet (2.3 mm in dia. ) of about 18℃ is dropped from a height of 20 mm above the heated surface and the evaporation behavior on the heated surface is photographed by a high speed camera. The initial temperatures of the heated surface are in the range of 140-220℃. At temperatures of the heated surface above 200℃, in the case of a fresh surface, the residence time of a drop on the heated surface is about 13 ms. While in the case of a contaminated surface, even if the drop is about to rebound from the heated surface, its root is so firmly contacted with the heated surface through the thin liquid film that the residence time is longer than that of the fresh surface. This fact proves that the surface with scale has a high wetability. 日本機械学会 1988-08-25 2017-03-27 jpn journal article VoR http://hdl.handle.net/10087/2598 https://gunma-u.repo.nii.ac.jp/records/3143 http://ci.nii.ac.jp/naid/110002401470/ 0387-5016 AN00187441 日本機械学會論文集. B編 54 504 2121 2127 https://gunma-u.repo.nii.ac.jp/record/3143/files/B54_2121.pdf application/pdf 1.0 MB 2020-11-25