0609 低クオリティ領域におけるヘリカルコイル伝熱管内沸騰二相流のDNB現象(S45-2 原子炉システムおよびその要素技術(2),S45 原子炉システムおよびその要素技術)

概要

論文の詳細を見る
This study deals with specific phenomena to boiling two phase flow in a helically coiled tube in a bath kept at a constant temperature. Two phase flow tends to be intermittent under a low quality condition and may be strongly influenced from buoyancy, gravity and centrifugal forces. Therefore, the investigations on detailed phenomena under a low quality condition are required for the sake of the design of safe structure and safe operation of heat exchangers with helically coiled tubes. Thus, in the study, the characteristics. of boiling phenomena were investigated experimentally using an apparatus of scale model using water (or N_2 gas and water) as a working fluid. The result suggests that the inner wall became in a dry-out condition after boiling of water and got wet again owing to arrival of water plug. Therefore, it is supposed that DNB may occur repeatedly.
社団法人日本機械学会の論文
2007-09-07